Our team is planning to do this... using the IPS extrusion should make making a second frame a breeze. We will, of course, have to buy extra motors. We're not decided as of yet if we will rip electronics off of an old robot, or buy new parts. Since we are using most of the motors in the kit, I'd wager we will do both! I'll post back on CD if and when we get this to happen. 8)
RIGHT NOW we're still a number of hubless sprockets short of ONE robot!
