I'm not even going to criticise the other robots, but Updraft? Let me just list 5 of the problems there are: why so arrogant/negative man ? just point out his mistakes1. Way too much empty space. Explain why this is bad2. Piglet drives. Explain why this is bad, he's a newbie he doesn't even know why they are bad3. Inward facing drive motors. more explanation needed4. There is 25kg left for maxing out the bot. Use it.5. You don't need CO2 for Burst Motors.Unless the other members here are going to reveal your other mistakes, fix these first. You're gonna need a hell out of a lot of work to become a better builder.