Yeah I can't take credit for the initial build/design, I just bought the chassis a few years back as a basic robot for my dad (which turned out to be crap) and I've only just got round to rebuilding it, so figured I might as well restore it to its original looks.

btw what voltage drills you use in carcinus? and how did it do at pull and pushing once it got robots in the claws?
The motors were 9.6V to start off with, and then 12V at some point (can't remember exactly) but the robot was running on 19.2V.
Never got a chance to pull or push a robot in the claws because the grip wasn't strong enough to hold them. Whenever it tried to pull a robot away, the opponent just slipped out of the claws. The actuator above has loads more power although no increase in speed, so will see how it performs. And a one-on-one would be good - you going to the champs?