Im new to the UM family as i just got a UM2 that has the + upgrade done. what did the duet3D board do for you? I have a robo3d, a Gmax xl+, and now the UM2+. my robo3d has about everything on it modded my Gmax is stock. The only thing i want to fix on my UM2+ is the noise, I have lots of squeaks cumming form somewhere in the gantry and i get a high pitch sound coming form one of my driver/ stepper motor on movement form one part/move to new location.