HSC1932
I have sanded down the turret bottom with a 160 grit sanding file. Looking at the upper hull, I do see two rings where it seems the turret cut into the plastic (the friction marks you're referring to).

Zsolt Czegle
OttovonLindberg upload photos about your build into your project's album. So we can see your photos and so we coud help you! 🙂