[Jeremiah H]

Does anyone have a favorite material they can recommend?

We use stuff some people have called cloroplast(sp?). It's the verythin-walled, corrugated polycarbonate sheeting used on the ends of greenhouses.

I agree - here's tip. don't use castors for the front wheels if you don't power all four wheels. There's a right way and a wrong way to do castors...

Could you please elaborate a little bit? We are planning to use them on the rear of this year's bot, but if you know something that we haven't figured out yet, 393 would be mighty grateful if you could enlighten us. Thank you!