[patrickrd]

Beautiful... I love robots that have different sets of wheels to shift gears. But someone has to be a skeptic... how much does it weigh? We tried a similar thing (with four motors and two sets of four wheels) in 2002 but had to take off two wheels, two motors, and a whole component from our robot to be able to get underweight. I guess if we had designed with weight in mind from the beginning we would have had much better success though (a subtle hint to any young impressionable team members out there!!). Your design looks much more weight efficient. Did you do mass analysis with Solidworks? Hopefully I'll somehow get to see the finished bot in person (or at least you can post some pics at the end of build season)!

Good luck
- Patrick