Thanks for putting this together, my Wii U is revived! I've been messing around with it a few days now and haven't noticed any issues at all. I tried updating a couple of games from the Wii U menu, can confirm it is working fine on the rebuilt MLC.
I'm using the version from consolemods dot org (I'm not allowed to share links yet :glare:)
I am running Tiramisu. I previously had CBHC, I uninstalled it before getting Tiramisu and doing this.
Thanks for the guide! Booting without SD did not work for me at first (for me there is no "sys" folder in "storage_slc"). I tried creating the path but it didn't do anything. When I put the "hax" folder directly in "storage_slc" that fixed my issue