All the models here are made to be used with BOSCH Rexroth BTUs.
Adept
— for the original ball size
Adept 50 mm
— for 50 mm ball
I highly recommend using STL file and not the STEP one. Slic3r-based slicers don't work perfectly with Onshape STEP's.
Also, consider layer height of 0.15 mm or 0.2 mm for the default ball size, and 0.12 mm for the 50 mm ball version.
2 mm taller. That's it! For the 55mm version, it's a different story. Buttons are smaller and thinner (not by a lot), and it's even taller.
Default one is compatible with 44mm and 45mm balls.