Jamie just beat me to it but he's right that robot has been around a bit

When we bought it we had to replace a couple of sprockets and I'm fairly sure they came from technobots (but this was back in 2007 so I can't be completely sure)

As it's been so long since we had the robot I can't even remember the ratio for it but Clive may be able to help out with that one. something in the region of 8:1 seems to come to mind but that is probably wrong