But my main problem first is I'm stuck in diag mode. I replaced the files so now only the original files of what I had before attempting the jailbreak are in the root folder, but it does add its own diagnostics_logs folder (which is empty). I'm wondering why now that I've replaced the files properly a hard reboot doesn't work and lands me back with diags mode.
The only wrong thing I did was rename the file data.tar.gz (instead of what it showed up as on my laptop 'data.tar')
Is there a good de-bricking meta thread so I can read more about how to get out of diags?