Hi Everyone. This was not my idea- I saw someone else had done something similar and I loved the idea so I wanted to do my own. The Leader class Beast Hunters Optimus is really a great figure on its own but it is great as Grimlock! Basically this is a Beast Hunters prime with a MP Grimlock head, MP-01 Hands and I articulated his ankles. Im really happy with how he came out especially since this was my first real paint job on a figure. He is fully transformable into the Prime Truck. The wings on his back are basically the truck grill that used to tuck into the feet- Since I Articulated the ankles they no longer fit so they work good as Grimmy's wings. They just clip on to the rail that used to hold Prime's weird dragon shooter thing in his back.