Hmm, lowering the back, but not the front sounds interesting. I could see it really improving the look of the figure from the side. Am I correct in assuming that all I would have to do is sand down some of the plastic towards the back of the inside of the dome?
You would assume correctly, Zeiss. I think I sanded down that back ridge inside the dome than anything else (it's also the largest one). But, it not only improves the Vader's profile, but you'll notice the difference even from the front! IMHO, it more accurately places how Vader's helmet should actually sit & (as crazy as it sounds) suddenly that helmet won't seem so tiny anymore.