LOL
Sorry to give the impression that we just couldn't duplicate their designs. It was actually a joke. During competition we redesigned our drive train over 7 times (no joke), putting us on the field with a new attempt each and every time. Note to self and all listening: never use bicycle sprockets! It wasn't my idea and there's no need to point fingers, so I'll leave it at that.
As for creating something like this drive train for our robot, we didn't have the tools or money needed, not to mention the fact that we decided not to use gears (next year may be very different). I know that seems odd, but the reason is simply that we couldn't contruct something that we were confident enough in to think it wouldn't get twisted and mess up the gears or gear boxes. We had trouble keeping our sprockets in relative alignment
.
Anyway, thanks for your tip on getting something like this made cheap and easy.