[Matt Reiland]

Also don't forget that you can also use a 'chain guide' type of system to do the same thing. Last year (At Buckeye) our robot was hitting things so hard the 80/20 frame was twisting and it would cause the chain to loosen then derail from the sprockets, then the frame would come back and we were stuck. We added delrin plates to the sides of the sprockets that formed a v-shape that forced the chain on the sprocket if it became loose or tried to derail. These solved the problem for Geat Lakes and Nationals and we never had a chain problem again.