similiar to my first robot prodigy, i used cheap box section from b&q, i had 5mm mild steel scoop, 10mm hdpe bolted to the sides and back, 4mm hdpe lid, 2mm stainless base. Was a really simple design you can build one in a good afternoon lol, think i built about 4 versions including a clusterbot.

(going off memory here)

it ran on 4 drill motors, with a sabertooth, and 2 x 9.6v packs. was my most successful in competition, most reliable and easiest to fix.

I was never bothered about sticking it in with any spinner, had a few spinner fights and never lost one. all you needed was a file and hammer to fix the knocks, and u were ready to go again.
great first robot, but for me I soon got bored of not causing damage to others and just recieving it

my first ever fight with it, and it was against 2 spinners!




testing my old spinner out on prodigy chassis





not sure where prodigy is now, did sell it to jack orr i think??, got a 6 wheel drive version here but i havent bothered to finish that one at the moment, its gathering dust on my shelf.

As mentioned above you are going to have weight issues without a doubt, you are gonna have to drill alot of holes to reduce the weight!!, you will be surprised when you put 4 drills,wheels, batteries and speedos on a set of scales how heavy it will be.