Ah, I'm only saying because the robot is roughly 750-800mm from the bottom to the top of the flipper (Also the same height as the top of the robot. I've found one at 500mm stroke, how long, generally, are they with that kind of stroke? I don't really want to be putting chunks of material down to push a ram up, with how unstable that would be. I could use a shorter one, I suppose, if I angle the ram forwards a few degrees. Around 30 should do it, if my math is correct.