Hello there,
I am actually owning an UM rev3 (2012). I made some upgrades since, ulticontroller, hotend v2, etc...
But even with ulticontroller I always have to plug my printer with my computer(usb) to have enough power. I read one or two years ago that you can modify you printer to avoid the usb connection to power it enough.
Is there someone that can help me please ?