I made thumbstick covers/grips/locks, whatever you call them.
There is an STL for one that works without thumb grips.
And an STL for one that works WITH thumb grips. (I've personally tested this with Skull&Co thumbgrips and it seems to work pretty well.)
Print Settings:
Print with the shorter side down.
You'll need supports on the build plate
Magnets:
You'll need a 3x1mm magnets, I personally use this: https://www.amazon.com/gp/product/B09D2RS712
And of course, if you don't have a 3D printer, I sell them here: https://www.etsy.com/shop/DinoMeetsDonut
The author marked this model as their own original creation.