Nonnef's replacement parts are two separate pieces, and that was definitely the right decision. There is a minor clearance issue with the replacement parts, but with a little practice it's barely noticeable, and I'm not worried about anything breaking. They look great and stand straight. I would not recommend pulling on them to get the head out of the torso, instead either use a screwdriver to pop it open (a big failing by Hasbro engineers) or, as I have found, pull Silverbolt's head assembly forward enough to get a finger into the cavity in order to pop Superion's head assembly out of the torso.
I give Nonnef's product two thumbs up.

