I have been chipping away at this for a bit and it has been going well. Order a little bit, assemble, order some more, assemble, repeat. I have it mostly assembled but now I'm to the things I haven't given much thought until now. The machine will be a 40x40 Acro (2 axis), 4w Laser & Arduino Uno w/Grbl 1.1 ( and maybe Lightburn ) First topic I am having issues finding info on is endstops and slaved motors... On my large CNC that I built years ago I have the Y axis also propelled by dual steppers. Both have their own endstops which I home in Mach3 or UCCNC before every run in order to "square" the machine. My plan was 3 endstops, X, Y&A to zero everything. How is squaring done with GRBL, is it the same?