PSA 42% is "100%" for resolution scale. I cranked it all the way to 100% because I thought it was going to render at 42% of 2K which was silly because I have a GTX1070 and cranked everything up max, and I was dumbfounded at the 30-40 fps I was getting. Someone forgeted up there. Set it back to 42% and cranked everything up and a solid 60 but might overclock my monitor and go for 120.
The armored train is fun as forget. Bomber turns and moves slower than anything imaginable, while the fighter is actually halfway decent.