Hi, I've just finished building my Ox, did a few test cuts, and I'd like to make sure the x and y axes are perpendicular. I know how to *measure* how square it is... it's the *making* it square that I'm concerned with. I've seen this thread https://openbuilds.com/threads/squaring-the-gantry.7919/ and other posts, which say to make sure the beams are cut square, and screwing the plates on evenly. I think the ideal solution is to have independent y-axis motors and limit switches, so you can basically square the machine every time you do a homing operation, like this: Leveling, Squaring, and Tramming Your CNC Machine | CNCRouterParts However, I'm using GRBL, so my y-axis motors are tied together. What I'm thinking, is to add a manual switch to one of my y-axis drivers (the STEP input), so I can disable that motor and only drive one of the y-axis motors. Then, I can jog that motor slightly, while the other motor is stationary, to make it square. This basically the mimics the above cncrouterparts homing operation, but manually controlled. Has anyone else tried this? Is there any reason why it wouldn't work? Thanks!