How would you spend £500?

That is brilliantly done, excellent! One thing I would say though is you could probably do with a bigger space for the fights.
Still very cool :)

Harry.

I wouldn't mind a go at that! Nice job on the kits, they look very nicely done. :)

Looks awesome! I think those electronic boxes with the esc's all wired up would make a great component for a new person to robotics as all the have to do is plug battery and motors in!
Just a thought