I see you found a software fix. Great! I built my um2+ from a kit and it came with an updated aluminum feeder. I was able to remove it and turn it 180 deg. with just some very minor work. I just had to use a 60 deg bit to open a screw hole so the screw head would fit. I don't think I would do the kit again as I had too many problems. Motherboard burned up so I added a 24 v cooling fan, print fans would not work as they were wired wrong. Then after fixing wiring found out fans were defective, after I level bed it says z switch bad but is ok after a powee down and power up. Just too much to deal with for such an expensive machine.