Porkmann: Both the Panzer IV and III are our first two kits (done almost a year ago), even though we have done a lot of research, we still find a lot of inconsistencies afterward. For the latter kits, a cross reference system was setup to ensure more historical accuracy.
This is also one of the reasons why we setup this forum. The forum is a good tool for us to show our WIP projects and to enable people who are interest in our projects to give advice and to point out the obvious... We want to create something we are proud of!
Unfortunately the Panzer III do not have the twin mufflers included. A simple conversion should do the job. But we are working on a StuG III Ausf. G, which had the normal mufflers... (oops! secret is out!)