Erm it's just a ram bot without a wedge to see if it glances off spinners. Which is really what's built to fight. And I'm giving these a try randomly

https://www.technobotsonline.com/919...otor-50-1.html

with skate wheel hub adapters and wheels. Whole thing was like £30 or so delivered and just screws together stress free.

The big thing I should mention, is that if I stay away from a wedge I just need a quick box, in which case any 12v motor setup I can get cheap and find hubs and wheels for should be enough to bash along at a decent rate and hit someone. Obv if it's rubbish you learn and get something better for the next robot.