Hey Just bought yout software. I have 3 problems with it. 1. Why can't I set layer height of ex. 0,3125mm ? Only 0,31. Don't like this rounding "error" as I have a 8mm leadscrew, and per http://calculator.josefprusa.cz/#layerheight 0.31mm is no go, but 0.3125 will get "clean" ste...