Just moved up from a simple metal to the Robo3d R1+ and I couldn't be any happier! I really like to get my hands on things so two days later and I already knocked out a few quick mods! Ive printed feet and rod stabilizers for it but I noticed the back foot didn't sit flat because the case was bumping up against the outlet mount on the inside a quick hit with the dremel fixed that! Another quick one I was was print rocker switch mounts and added a Switch to each led behind the front corners! Also popped a u3d v3 .6 nozzle on it so I can throw some plastic out and catch up on some prints! I will keep toying with this thing and keep the post updated!