Thanks!
Rory's is even dafter than mine, I think we're both going to Insomnia so it'll be interesting to see how they compare in the arena.

I got most of the plastic parts finished today, with no more snapped bits. I had been worried about the hubs fitting the wheels as they're such a 3d shape, they took a little dremel tweaking but now they fit fine:
2017-08-13 20.07.47.jpg2017-08-13 20.39.05.jpg

Traditional pretend-o-bot:
2017-08-13 21.00.08.jpg