C-3PO arm with taper - large printer

thingiverse

So when I created the original arm files, I was trying to keep the bicep a straight tube. As I understood it, the movie suits were a straight tube and adding a taper was noticeable compromise. After receiving the rest of my parts and suiting up the first time, I discovered that while I maximized the bicep diameter for the forearm that I thought looked accurate, it was just a bit more snug than I'd like and was binding at the shoulder bell. This version adds a SLIGHT taper to make it 4mm larger diameter at the top. I also noticed that my attempt to put the shoulder at 20degrees out from the belly, it was actually 70 degrees out (20 in from straight forward. This one is at 35degrees out from the belly. Should be a little more comfortable. Hope you find the adjustments helpful. Better late than never: I promised at some point to add some detail about the piece I intended for the piston connector. I just attached a snapshot of the model and a PDF drawing. The piece is made from some extruded aluminum I bought. It's a 1"x1" 'L' shape that is 1/16" thick. I printed out the drawing, cut out the profile in actual size and then used a hacksaw and files to shape it to the paper. Once it's all fitted, I just expoxied it in place.