Thumb throttle mod case for the trusty old FlySky GT2B. Follow this project at (more instructions/photos, etc): http://www.electric-skateboard.builders/t/gt2b-baby-buffalo-mod-case-3d-printable-thumb-throttle-case/4694
Case sides are designed to be printed flat side down without support. Thumbsticks should be printed largest flat side down as well. I've been getting excellent results with eSun PETG.
All source files can be found here: https://cad.onshape.com/documents/57492363e4b0e481fb3b14f4/w/0699c8a2c4713782c84202b6/e/387affeef8dc732f6b233af7
As this is a work in progress, I recommend creating your own .stl file from the above link. There're tons of OnShape tutorials and it's free to use.
-Multiple steering POT thumbsticks of varying inside diameters added- the "6.xmm" in the file name indicates the inside diameter.
-Latest .stl's uploaded, please report any issues
-There are two thumbsticks: Use the "steering POT" for 90 degrees of sweep and the "trigger POT" for 50 degrees.
-There is a left case side without LED cut-outs for translucent filaments (like the natural PETG case in the gallery photos above)