I'm generally happy with PotP Rodimus Prime, but I just wanted to improve the arm/shoulder articulation a little bit. I made the new biceps joint with plastic plates and a ball-joint. Now, Rodimus can open arms (but not too much) without raising his shoulders. In photos, you see the custom parts in gray. (they were still work in progress) Here's the close-up view of the custom joint: In action: My copy of Rodimus Prime had almost no eyes. They were just narrow, black slits. When I opened up the head, I found that Rodimus did have painted eyes, attached to the back of the head. The holes on the face were just too small to show that. So I cut the front piece a little bit to make the eyes visible, and I put some metallic stickers I had at home for extra visibility. The head parts were held together by a screw and also a pin. When I opened the head, I broke the pin, so if anyone wants to attempt the face mod, just be careful. Anyway, in alt-mode: I made also a cover to hide the space between the arms. This cover piece can be stored in the backpack in the bot mode (hence the funny shape): Now I need to polish the parts a little bit more and clean them up, and then paint them in red.