You literally just quoted the instructions you need to follow.As mentioned earlier, after flashing a factory image to get to 12 and installing Magisk all was well. But the OTA didn't complete the install for the January update, and even restoring images in Magisk didn't help. So now I need to update in another way. This recipe is clear but IIUC the data will be wiped (factory images have the -w switch in the shell script). Is it possible to do this but delete "-w" so as to not wipe my data? Or perhaps I should just flash the OTA? Thanks for the help.