I cant see the pictures because my school blocks them
But, I did see that your chassis weighed 20 lbs with hardware. That is very light! Now I cant see it, so help me out here. Did you guys bend your 6061 aluminum? We had a couple things bent out (like a battery box, and a claw for 2011) and our battery box was really weak at the bends. In fact, one match, we got a hard hit and the box cracked and we had to replace it.
Our chassis is water jetted 5052 aluminum. We got this idea from team 67's 2012 tech notes (Which I recommend everyone reads). We bought the stock 5052 sheet and gave it to Chrysler for water jetting since they only have 6061 stock.
Anyways, our frame is 10lbs without any wheels or gearboxes. We are getting it powder coated and we will put them on. Our prototype shooter weighs more than the whole chassis!
Edit: I saw the chassis! It looks really nice! You sure use a lot of rivets! By the way, changing http:// to https:// in almost any link that is blocked will let you go to that site