Just throwing an idea out there for someone who might have the time, but I was looking at the Movie Protoform Starscream and it, with the way it transforms into "Entry Mode" it looks like it'd be a great base for a Hearts of Steel Starscream. The Entry Mode already kinda looks like the fuselage of the HOS altmode of Starscream, so you'd just have to add some Bi-Winds, engines, and propellers. I'm currently in the middle of a project myself, but perhaps one of you are interested in this idea?
These aren't the best photos to illustrate my point, but you get the idea:
