M3 Thumbwheel - Labeled with Grip & Flattened

Wanhao users warning: Reduce radius to 12mm or less! Default radius does not work.

Those of you printing at 0.2mm layer height may wish to set the value of hs to 0.6 instead of 0.4. (Line 27) Check your slicer thoroughly before printing!

Directly remixed from:
https://www.thingiverse.com/thing:874155

but also credits to:
https://www.thingiverse.com/thing:844008
https://www.thingiverse.com/thing:225188

since those Things contain most of the work done here!

Major changes:
- Flat