Joy-con grip shoulder button

I added fillets to the insides of the arms because they kept breaking after some uses. I also rescaled X and Y up slightly (2.1% and 4.2% respectively) so they fit more securely.

The size is for the grip scaled down to 96% in Z only (i.e. X and Y are still 100% scale). You can find the grip at https://www.thingiverse.com/thing:3287257

Print it with the arms in the X/Y plane and with supports under the side arms. Otherwise the layers will be parallel with the bending they experience on insertion/removal and snap.