Looking good Shawn! I already see the red bars that lower onto the ground and lift the robot up, acting like a brake or some sort unless there's more attached on them. I bet its for the HDPE surface! Building a king of the hill robot huh?
Pretty cool chain tensioner for the wheels.
The most interesting part is the 5th wheel... The pneumatic connected to it seems to be really really long to lower the wheels onto the ground... But even more intrestesting is the way the 5th wheel and 6th wheel (I assumed there will be one) are at an angle with the frame.
I also see some pivots on the side of your bot... For some sort of wings I suppose... ;P You guys are going to have a really huge robot!
Just a couple more things missing, like something that will mount to the plates on the frame opposite of the 5th wheel, as well as the bars pointing upward on each of the corner on the 5th wheel's side.
Hmm... Now this is just a guess of mine, but maybe you guys will be climbing over the side bars with the red bars and the 5th and 6th wheel? Well, that's just a wild guess...
Got to love the colors on your bot.