[ALIBI]

We used bungie cord and a couple of pulleys to balance our arm that uses the 36mm. The only time we stripped the gears was when we made a hard mechanical stop smacking the arm against the frame on the way down before the programers had the correct limit variables set on the pot. Our lead engineer also showed the kids how to attach the motor using a torsion bar to give the motor, 36mm reducer, and arm a little room to play to avoid hard stops and starts. So far so good. There is a little wobble at the end of the arm before it settles down when we hit the presets, however, the wobble seems to be a lot less than the wobble in the spider. It would be kind of hard to redesign at this point. We did not consider steel gears and can not offer any help there. Good luck!