I found 2-56 screws from mcmaster carr, the length is a bit too long and the head is too big to fit in the recess of the orbital.I can mod the screw so it will work......but I choose to hit up linegear and spend my time rebuilding instead of modding screws.if you want a mcmaster part number I can post it and you guys can play with the dimentions.cost was 50 pcs for $ 6.00