At the end of this page ( https://www.prusaprinters.org/calculator/ ) there is a graphic calculator which tells you after how many mm your CNC head will reach a desired speed based on acceleration you provide. It's useful to calculate the length of the "pass extension" for each CNC machine. Also, thank you for the software, please continue developing it. Meanwhile i will try to find out how to edit a .gcode file generated in LaserGRBL in notepad++ to make it look like a file generated with ImageToGcode... If i find a way and it's repeatable, i will make a video tutorial and post it to youtube, so others can use LaserGRBL on Marlin based printers... AFAIK noone does that now.