This model is an original file, with the one exception in that I did rely on (and thank) M. Bergerman, whose turret file I used (from his 1/200th scale T-34/76). The .stl was test printed at both 0.06 mm layer height and 0.1 mm layer height. There was no benefit to print at “extra-fine”; the results were just as good at 0.1 mm and the entire print only took an hour.
DO use supports. there isn’t much support required, but what it there is needed. The turrets and Katyusha rack fit on the protruding nubs; they will pivot nicely or you can glue them to prevent loss.