The Australians did something similar whereby a certain percentage of your robot had to be MDF (I think it was around 50) but this ran into all sorts of complications since it's very difficult to test this.

Even when building the robot it can be tricky to keep track of how much weight went into a certain material. For components it's easier but the wood could be used for all sorts.

There is a slight caveat to this though. The robot's structure and armour must be wooden, so if someone does turn up with a 6kg Hardox disk attached to the robot, it will rip itself apart in no time.

That and no one will want to fight it....

By the way, I don't plan on running any sort of competition with this class, is mostly about putting on a good show and having fun. Although it'll be interesting to see who's is still running come the end of the weekend.