Replacement shell for Logitech Mx Master 3 and 3S

Replacement top shell solves the problem of disintegrating rubber, bringing new life to this amazing mouse.

As far as I know, there is also no good alternative solution to this problem - replacement shells that you can buy come from donor mice so they are very expensive and skins are either also expensive or don't cover whole sticky area.

Fuzzy skin version - adds three bodies that can be used as modifiers to enable fuzzy skin - under thumb, on the right side or fully on the outside. It currently doesn't work in Bambu Studio - read more here: https://github.com/SoftFever/OrcaSlicer/pull/6759

Print in material with strong layer adhesion to avoid breaking screw standoffs, PLA is fine, PETG could be to weak. I used Zadar PLA LIGHT White and Prusament PLA Marble Grey.

Changelog:

• V68, Alpha version of mouse buttons

  • Functional, but the left button is not well aligned and doesn’t look great
  • If yours are broken, this is a good temporary solution. Otherwise, I’d recommend waiting for the proper release - hopefully in the coming weeks
  • No updates yet to shell geometry, so V58 is still the latest shell version
  • Special thanks to @dkircali for providing his 3D scan

• V58, changes proposed by @noongom

  • Trimmed thumb button flap to increase range of motion
  • Trimmed back-thumb overhang to improve fitment 

• V53, addresses biggest issues with pervious version:

  • Improved thumb button - wider and softer (still not perfect)
  • Tightened the  gap at the back between the pieces (is still isn't perfect due to the inconsistency of sagging or curling overhang)

How to replace:

Recommended tools:

• TORX T5 and Phillips #00 screwdrivers
• Craft knife (for lifting the skated without damaging them)
• Pliers/side cutters (for removing supports)
• Tweezers

Video tutorial:

Tips:

• Keep your screws organized - there are four types:
  • single TORX one above USB-C port, 
  • five thick ones for holding to  the bottom shell, 
  • four with wide head that secures right, middle and left button,
  • most common type that secures the rest
• Be careful when screwing in screws - don't apply too much torque or else threads could strip or standoffs could crack.