I doubt there will be a build thread for Diotior here. They're one of the oldest teams in Robot Wars, and I'm pretty sure anything they built was long before the days of this forum. They did have a spring-powered flipper though - looked to me like a lifting bar with a compressible suspension spring either side. Im guessing they used gears and some kind of remote clutch to wind it up, but I'm not sure. I think you'd be looking at the 2nd to 5th wars or thereabouts for Diotior in action. I don't know if the team are still active in any way.