pic: Current Robot Chasis

[edboy]

you should the the corner cube pieces, they provide a lot of stability
on the more stressed parts of the robot, you might want to change out the L brackets with the triangle gussets, they are much more stable
there are also two types of L brackets i know of, one thinner than the other
if you are using the thin ones, definitely change them, or your robot will be scrap

[Justin M.]

80/20 is really nice to work with (t-nut mounting system, never have to to drill holes, etc), but I agree to the notion that it's REALLY heavy. We are using it to attach the arm to our chassis, so we can move it up/down and make adjustments super quick.

Keep in mind that the 1010 is like .5 lbs/linear foot....