You must've misread my original comment. I did not have any problems changing the region, only the Erase MLC step which I skipped. In the end, it all worked out well except I had to disable the quick menu on the GamePad.
Thank you so much for this guide! I was able to change my White 32GB unit from JPN to USA. I would add however that the Quick menu should be disabled after doing this as trying to launch the Wii U Menu from the Quick Menu on the GamePad will crash the system. Also, while trying to Erase MLC, it...
Are you near sea/salt water, or in general they just don't last. Sounds like if you driving a mercedes, you need a garage. I get snow n ice here so nothing worse than clearing that shit off at 6am rushing to get to work.