CR90 Corvette fixed model, FDM printable

This is a remix from https://www.thingiverse.com/thing:398515

The original .stl file seemed to be incomplete or damaged. Fixing it automatically resulted on some unpleasant asymmetrie. I tried various programs: web-based, Prusa-slicer, Meshmixer, they all gave me the same result, so I decided to cut and mirror the model to produce a symmetric .stl. I also cut the model for better printing. The turrets can now be printed in high resolution with a lot of support. The lower and upper half need some support from printbed to achive best results.