[Holtzman]

I choose sprockets were used for a couple reasons. There was quite a debate among team members regarding this. I am not the head designer for my team. This was something I worked on my own. It was my opinion that sprockets were the way to go for these reasons:
1. cheaper
2. allows for more flexibility for choosing distances while maintaining gear ratio's
3. requires less precision in holding tolerances when machining side plates.
4. Allows for a change of gear ratio's easily.

5. just as efficient as gears if chain is correctly tensioned.
(I calculated the center distances with Matt Adams sprocket center distance calculator. Thanks Matt)

All 4 wheels turn together, and steering is tank style. Its simpler than having paired wheels for steering, or 4 wheel independent, especially since we don't get 2 globes in the kit anymore, or 2 of any appropriate motor for that matter.