After printing the model, I didn't want to make a cape that wasn't printed so I drew this up. I have printed it on a rep 2X at 0.2mm layer height in ABS with no rafts or support material. It fits perfectly between his head and body and comes down all of the way to his feet (this I am pleased with as I hadn't finished printing the model before designing the cape and so had to guess on the length! I'll upload some photos later.No support required. Print and fit onto your Lego Darth Vader found here: http://www.thingiverse.com/thing:50300