RE: Panzer IV sound question
I can let you know for sure later today hen I install the elevation and rotation.
As it is, I didn't hear any while testing the running gear. It has MG and cannon sounds without them hooked up, so I suspect it doesn't have them.
I'm not up on the mechanics of the IVs, but I did build DML's static E years ago and seem to remember a lot of hand cranks in the turret. Since they were the cheaper/quicker construction of the German armor, maybe they were manual rotation and elevation.