I’ve got a K40 style machine pretty much up and running. I doccumented some of the modifications on my Youtube channel. It’s now running the Arduino board and CNC shield with GRBL 1.1f and when I’m happy with everything, will get a custom PCB to incorporate the output from the flow sensor, air assist and pump relays etc. One issue I’m having with Laserweb4 is that if I set the Y machine coordinate to -200 to suit the top left hand corner origin, then raster or vector images are loaded off the work area. Is there a fix or workaround for this?