I am using PWM, PEP5 and I2G.
He says they are using 70IPM which is about 1778mm/m which is a little more then half of the feed rate I have had to use to get good results. I have had to use between 3000 and 4000 mm/m as I2G has as defaults for leather/wood. My acceleration is set to the default 400mm/s2.
I was reading some posts yesterday about peoples setup (not on mpcnc) and they were talking about having their acceleration set to like 8000 or higher. I had tried 1500mm/s2 but that did not seem to really make whole lot of difference.