I’ve created my own modification to Marlin that implements a new command M103 / M105 to control the laser through pin 42. This allows the M106/M107 commands to continue driving the fan as stock firmware does. Also added 12bit pwm to laser instead of the current 8bit resolution in stock firmware. I don’t want to upload because i know people like to upgrade firmware from time to time and won’t be able to with mine without losing mods. I think best thing is instructions showing what to revise in each of the source files to implement the changes. I’ll try to get this done soon but no promises. Pretty busy these days.long live MPCNC!!!