This is the incomplete 2k8 bot for this past year.
Someone in the Best Drive train thread(I believe it was) asked for some pictures of our chassis, so here it is, (sorry it was so late getting up).
The wheels and hex axles were not put in yet, nor were the pots on the gearbox, the axles were aluminum on the 4 ends and the center axles that went all the way through back into the gearbox (direct drive center wheel) were steel.
The actual chassis is 4x4 1/8in box tubing, with a 1/8in sheet on the bottom and a 1/16in sheet on the front and the back all riveted together to form an incredibly light and rigid frame.
If there are any other questions feel free to post questions.