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Mouseholder

This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice

The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)

To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.

Directions for Assembly and Use contains pictures that accompany these directions.

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
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This file includes 3-D printer files for custom mouse holders for lean and obese mice 
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
About
This file includes 3-D printer files for custom mouse holders for lean and obese mice 
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
About
This file includes 3-D printer files for custom mouse holders for lean and obese mice 
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Readme
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
About
This file includes 3-D printer files for custom mouse holders for lean and obese mice 
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
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1 fork
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
About
This file includes 3-D printer files for custom mouse holders for lean and obese mice 
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
1 fork
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
About
This file includes 3-D printer files for custom mouse holders for lean and obese mice 
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
1 fork
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Mouseholder
This file includes 3-D printer files for custom mouse holders for lean (< 35g) and obese (up to 55g) mice
The 3MF files within each folder can be used to print multiple parts simultaneously. Each holder is composed of 4 printed parts. The gate is made up of an assembly of the gate bolt, gate handle, and gate. The chamber is the 4th part. The holder also includes 3 parts that can be purchased at your local hardware store. 3 parts from hardware store include 1) Compression Spring 3/4" Length, 7/16" O.D., 0.047" Wastegate, 2) Pan Head, Phillips, Machine Screw 8-32 X 1.5", 3) 8-32 nut (fits with screw, part 2)
To assemble 1) put machine screw into gate_bolt, 2) put spring over gate_bolt, 3) Put gate handle onto gate bolt, 4) put nut in gate, 5) using a Phillps head screwdriver, screw machine screw in gate bolt into nut in gate (continue screwing until it is tight), 6) put gate assembly into chamber. For most uses you will want the extension on the gate handle to face the mouse. This prevents the mouse from turning to look out the opening at the top. However, we flip the gate when dealing with cannulated mice.
Directions for Assembly and Use contains pictures that accompany these directions.
About
This file includes 3-D printer files for custom mouse holders for lean and obese mice 
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
1 fork
Report repository
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Contributors