As far as LightBurn is concerned, the Y axis is the rotary axis for yours. The code that I send to the machine isn’t any different, it’s just a visual indication that’s missing. The framing is going to be a bit of a trick - If you ever try to use the O-Frame button on a rotary with the U axis, I’ll have to punt and make it fall back to the rectangle, since there would be no command to do a coordinated X/U move, only X/Y. I’ll have to get my 6445 set up and flashed with the new firmware to see if I can tell it apart from the old one.