Ok but just to clarify, I’m not talking about speeding up the Feed rate. I’m talking about playing with the acceleration setting in the firmware.Jacking up acceleration setting may let you increase the feed rate a bit more. For my feedrate I usually do grayscale at about 1000 to1200mm/min. Might be able to go faster but I’m usually watching a movie In the next room so why bother right? Maybe some other burners will chime In with their usual feed rate for grayscale engraving. The optimization that Bryan added in the later versions of image2gcode will save some time too.