Unicron comes with all those great ratchet joints, but the figure is heavy, and he lasted only about a year of display in a cool robot-mode pose where most of his weight rested on one leg. Now the ratchet in his knee is very loose. His ankles ratchets got loose too, so he can't stand up anymore. Anyone know a way to tighten these ratchets?? I've never taken a transformer apart, but I'm definitely willing.