I see lots of drilling, staples and superglue in my future. As much as I like metal stuff for the weight, this would be so much easier if these were plastic.
OK, couple of days later and the arms are all pinned and attached. I'm starting on the shoulder pads but they are even more fiddly. Limited contact areas so super glue would not hold well. If I pinned it I'd be drilling right through the pin that attaches the arm to the body so that is no good. I tried gorilla glue and it went OK on the first guy. Second one I made a mess on though. With gorilla glue you need pressure on the joint while it hardens, and it hardens slowly. Which means rubber bands around things and trying to get them in just the right place. First guy I did two at once. Second guy I tried that, but after making a whole mess of everything I'll leave it to one at a time from now on. This will be slow.