I don't think 100% correct transformation with these movie toys really matter, it's more of a self preference thing.

I transform a few incorrectly on purpose since it looks better. Like Wheelie for example, I like using his feet instead of his wheels so he'll be taller. (for Con mode only)
I do prefer Ironhide to have the v shaped chest , instead of the flat look.
May want to do it officially when it comes to making instructions, but nice job anyway, you put alot of work into it and we appreciate it