yeah GRR had two robots, one ~10lbs under and the other one ~1-2 lbs over our weight class. besides swiss cheesing The programing team had to have more 0's than 1's in the code
on a more serious note:
drill holes in places like under the rc and speed controllers if it really comes down to it. Do not punch any holes in a part of the frame that bears any weight or is a support.
If possible replace any lexan/polycarbonate with a thinner sheet. if you can replace 1/8 with 1/16 it still should hold up fine.
If you guys have a camera on board and aren't using it take all wires, hardware, "perches" off for us that claimed about 1.5 lbs.
Also, if you have a compressor or pneumatics check to see if you can get away with having four tanks instead of having the compressor on board(~5-6 lbs). If you just can't part with your compressor then consider taking a tank off(~1lbs).