Whew! Finally managed to puzzle these guys together. I wound up removing Skyhammer's legs and Heavytread's large head and then trimming a bunch off Skyhammer to make him fit over Heavytread's legs. I drilled a couple of holes in Heavytread's abdomen for the pegs on Skyhammer and voila, instant Flywheels. Heavytread's top half has become sort of a backpack and I'm thinking about tossing in some rockets or something. I also want to try to add the jet's thrusters back in somehow, because atm the jet mode looks kind of silly and half gone (because it is, heh). But I'm done with the worst of it and he's nearly ready for paint. I've got Battletrap to do yet, but he's going to be a nightmare... I'm using the Windburn mold for the helicopter and my only currently workable model has the head/chest bit completely detached in order to go where it needs to, ugh.