This isn't the first time I've fixed the arm articulation of a Metal Sonic, but thanks to part swapping from a second Metal Sonic I was able to do it without cutting anything. I basically installed the right arm from a second Metal Sonic into the left shoulder backwards. I also added a silver paint job to all the gray parts so it looks more metallic. I included the other Metal Sonic which now has 2 left arms because he's now perpetually gesticulating like the other one's hype man.