Whew, ok, lots of questions to answer:
Jessica - We've been using the waffle tread material since 2002, and it's worked out great. The stuff's pretty easy to find (it's actually conveyor belt material you can order from McMaster), and it provides good traction on almost any surface.
pras - There are only 2 double solenoids. The other 6 are singles.
Elgin - Haha, thanks for the props. We weighed the complete robot last night, and it was exactly 129 pounds...it doesn't leave too much weight for powdercoating, which we think will add about 2 pounds. Looks like we might have to resort to desperate measures like cutting off a couple cm off each bolt or cheese-holing everything
