FLOSI
Nerf Herder
Just strip it down, remove the screws in the butt plate to get to the inner workings of the hips. There are disks on both hip ball joints and a plastic "wall" between them that the disks rub against. I just added some ace bandage/band aid material to both sides of the wall to increase the friction on the disks to keep the legs from flopping around.
I think I posted some pics of the mod in one of the Trooper threads.
Sounds easy enough... Got any ankle advice?