the head makes sense. the yellow looks a bit greenish almost like a constructicon. either way looks cool
Can I make a suggestion? Try taking the photo in an almost/completely dark room with flash and macro on. That may help. Or take it outside for natural light. That way my friend we can get better pics of this piece that I am sure is awesome.
In the interests of constructive criticism... that face looks nothing like how I'd picture Prime Sunstreaker. I do appreciate the effort though.
I agree that the head does not work so well- it seems more animated than prime. Maybe rework it a bit with harder lines?
Not meaning to be rude or anything, but his face looks like a snowman to me, lol. Still I shouldn't talk, I can't do mods at all!