I guess most people just weld or bolt on three or so big door hinges for each plate, and put them on the inside so they don't get ripped off. I suppose you could put some torsion springs on too if you were worried about them getting stuck too far upwards. Storm 2 in Series 7 had three hinges to each plate by the looks of things, and they held on pretty well. Panic Attack however looks like it used big long hinges that ran the length of the robot.