So, while messing around with Megatron and being unbelievably unsatisfied with the arm, I figured out a way to make it look good and still transform. Here's how I did it: First, I unscrewed the "wing" part from the bottom of the sword. I cut it in half, and removed most of the stuff in the middle. Then I mounted a pair of hinges from RotF Mudflap's legs (oddly appropriate) where the wing used to be. I shaped the hinges, and cut slots in the wings. After some gluing and reinforcing (as well as using Mudflap's kneecaps for kibble ), it was ready to go. As you can see, the arm can now be in either wing or hand mode. Even better, it still transforms! Oddly enough, I think it looks even better this way. PM me if you have any questions, and feel free to leave comments!