My 2007 SS megatron broke so I’m using some parts from it to customize my rotf one. I know some things on the legs are missing I lost them cleaning but I took the arm off the 2007 megatron and shaved down the mushroom peg to fit the new joint perfectly. It’ll still fit on the other figure but It’ll be a little loose. You can still attach the gun via the peg. And the neck just connects to the body with the hinge joint. I don’t know if I’ll paint his body to match the head because I’m not a good painter
Thank you. Although a little note. On the 2007 megs there’s a post on top of the mushroom peg. Shave that off. And shave the diameter of the mushroom peg down to fit comfortably. That’s my flaw. I didn’t shave the mushroom peg around the edges and now the arm cannon arm is loose