[MattC9]

Thanks for all the replys, they have all been great. I took this picture right after we put the sprocket in and now it does have a 2nd point of contact. Our arm is a 4 bar linkage with a 30in "finger" on the end of it and it weighs about 35lb, so I think our gear box should be fine. Our main mentor loved the idea of putting a guard on the chain, that will come out sometime tomorrow.