G1 Optimus Prime is a kickass figure, no doubt about it. He has lovely arm articulation. His knees and ankles bend. His legs bend at the hip, but due to the springs and whatnot he can't walk forward. I have kitbashed mine to change that, as seen here. Another thing you can see is that I just cut the realistic handle off his rifle so that he can hold the damn thing properly. I also painted his optics blue and painted Roller silver for cartoon accuracy. Then I modified the trailer to un-neuter the launcher. It now snaps fully forward, and no longer needs Roller's pegs to be pushed back. I've also fashioned an energon-axe for him, you can see it sitting on the deck in the third and fourth photos.