Yep. Hence the trial with ply. Gonna have to be careful of the weight. Doing it this way if I need to narrow it it I can work out the space.

The height of the back panel and length of the ramp is constrained by the size of the motors and wheels. So really the only thing I can change is the width. This design is 600mm wide, I could drop it down to 500mm without any issues. I'd like it wide as I want other robots to get on top so any weapon can do it's thing.

Speaking of the weapon I want to be able to swap out depending on arena. But first I need a working rolling chassis.

My plan is as follows:

1 Rolling chassis
1.1 fix wheel hubs and sprockets to wheels
1.2 sort out chains and tensioner
2 first wire up and fuse
3 Self righter
4 weapon
5 rebuild chassis
6 final wire and safety switch
7 cosmetics