Your gun installation error made me chuckle, I made the same error. But since the glue had time to set for some days, when I glued the turret together, I put it in the wrong upside down way.... at least I could move the gun, something I like in these models. Also, the missing marks or keys for the handles around the turret are an annoyance, and I remember having some problems with the tracks. Not Tamiya's best model, but still pleasant to do.
I am very happy about the polycaps and the locking tab mechanism. Polycaps and locking tab mechanism are the best part of modeling. But... Herbert, I am annyoyed that you don't use the correct terms for the parts. Absolutly no one says "rear plate". The technical appropiate term is "butt plate"!☝ Also: thank you for making mistakes for us. That's very heroic of you.