The mouse needed a name, so it is now called the Lil Magnum!  Because it is small!

Be sure to check out the tips on successfully printing a good, light Li'l Magnum!

This is obviously inspired by Optimum Tech's Zeromouse and Zeromouse Blade, but using FDM and a more affordable donor mouse.

The thumb and finger rests are in a reasonable spot for me, and the buttons are lined up well.  The shell requires A LOT of bending and finagling of the button paddles to get the donor PCB installed.

The model is parametric, but it needs cleaning up.  I want to make it easy to adjust the offsets of the finger grabbies, but it is too messy for that so far.  I will post the OpenSCAD after I get it cleaned up.

My current setup in PLA is 20.58 grams with the R1 Pro.

The button flapper paddles have less spring tension when printed with one perimeter instead of two, and the length of the plunger has been adjusted to make up for this.  I am using lightning infill, and I had to lower the “minimum sparse infill threshold” in Orcaslicer to 1 cubic mm to make sure the button arms would be hollow.  The width and thickness of the arms is dialed in for the springiness of PLA.

• v0.1 - First working prototype
• v0.2 - switches to separate wheel axle alignment piece
  • adds support pillars under buttons
  • adds slight angle to the finger and thumb grips
• v0.2b - Slightly longer button plungers to work with a lighter print
• v0.3 - Slightly lower left paddle, extra more lower right paddle
  • More extremely thin connectors across the bottom
  • Narrower button connectors
  • End stops to make the buttons feel nicer
• v0.4 - Minor change to match R1-SE STL
  • lower the PCB 0.8 mm to match
  • lower button paddles 1 mm
• v0.5 - Matching the PCB height of the R1-SE for v0.4 made my mouse jittery!
  •    Split the height difference to put both Pro and SE at a working height
• v0.6 - Add chamfers to buttons for durability and longevity
• v0.7 - Tweaks to the buttons to increase durability
  • Add lens support rails (adds about 0.12 grams)
  • Embracing supports and raising connector beams off build plate
• v1.0 - Replicate the exact lens-holder setup from the R1 and R1 SE model
  • Arms for the side grips are angled up off the mousepad
  • Arms are a bit sturdier
    • removing the support material here is more persnickety
• v1.2 - Reduced weight by more than 0.25 grams
  • Removed chunky undercarriage parts
    • Should be easier to support other mouse PCBs
  • Added parametric side braces
• v2.0 - Structural, weight, and ease of print changes!
  • Weight in front end reduced by 0.2 to 0.3 grams
    • Buttons are slightly more solid even with reduced weight
  • Button plungers adjusted
    • Square base instead of round for cleaner supported printing
    • Angled underside of paddles to reduce need for support material

• Li'l Magnum! shell for the VXE Dragonfly R1 / R1 SE / R1 SE+

• Li'l Magnum! 22-Gram 3D-Printed Fingertip Mouse Mod For The VXE Dragonfly R1 and R1 SE at patshead.com
• Can We Compete With The Zeromouse For Under $25? at patshead.com
• Ultralight Fingertip Gaming Mice - Two Weeks With My 21-Gram L'il Magnum at butterwhat.com