Depends on the diameter of the button head used. The button head screws I used were too large, so I had to turn them down some on my lathe. If you find some that are smaller in diameter, they'll work without any modifications.
the problem i saw with this Billy was the actual fitting of the screw into the motor. 2 of the holes in the motor itself required a wider screw (which was the 4mm); so I couldn't sacrifice any width. Yet, it wouldn't get through the grid motor plate holes...
idk... it all worked out in the end though
