What an entrance! I think you'll do well in this sport!

I agree with Max, though, you want to beef up every material you mentioned if you intend to fight spinners, save the UHMWPE. If you're under 10kg then you could just layer the whole thing in hardox. That would pump the price up a bit but, from the right place, not by too much.

Also the nature of this machine means it would very much be drive-based. Those gearboxes (lifter included actually) are going to experience a lot of stress. I'd actually advice against overvolting because of this, though I realise the speed of the machine will drop to just 7mph if you run nominal voltage. At the very least, support the shafts of all of the Gimsons on the other side of whatever is attached to them, and pray you don't shred there insides even then!

Good luck.

Also, I am a major fan of Guan!