Modifying the head was easy. Just snip a good chunk out of the internal tabs. The knees, on the other hand, that was a pain in the ass. Kept trying to figure out just what the hell was blocking the parts from clipping on properly. Didn't look like there should have been a problem in the first place. And then I kept shaving. And shaving. And still more shaving, and finally they slipped on, and even then they were still incredibly snug.