Thanks for the discussion on the early StuG. We have several volume of reference material on the subject. However, without starting the Panzer III digital library project, doing any StuG is empty talk.
Our priority now is to get the Panzer IV project completed before our "imaginary" deadline, then wrapping up some open-ended projects before we look into starting the Panzer III one! The Panzer III project is more complicated than her Panzer IV counterpart, and will need more time to sort out the drawings before actual 3D drafting can started. Therefore we definitely don't foresee any StuG coming this year!
The early StuG can be classified into 3 main groups - Ausf A&B / C&D / E. The differences are so minor, fitting the early StuG into a single box should be an easy task (except for unaccountable surprises).