I think what Mashi meant to say and didn't explain too well is that this is a pre-rooted /system image, in the form of system.img.ext4 inside of a pda.tar to be flashed via odin.
Both ways result in a permanently rooted system partition, just this way flashes it directly, leaving the stock kernel intact, whereas my method flashes a modified kernel which then roots the /system partition via a script.
Apparently the download site he uploaded it to doesn't allow non-premium users to download files that large.
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