[weaversam8]

I agree with having nothing under the totes, that certainly makes stacking easier. Our team is designing a mechanism similar. In my opinion, however, this design seems rather complicated, or at least unreliable. Ideally, a robot should have something that works the same every time. I speak from experience, due to the massive ice storm that affected part shipments for our team last season, our device for manipulating the game piece last year was rather shoddy and didn't work consistently. Don't let me spoil your ideas, however, because everything can be worked into something perfect with enough time.