Whelp...
Followed the guide, finished without any issues. Tried to install KUAL using MRPI, process finished, after reboot, KUAL wasn't present.
Rebooted my KOA3, the bastard now updated to 5.14.3.0.1 somehow, even though the device never connected to WiFi... and the jailbreak is gone.
Fingers crossed there's gonna be another 0-day in 5.14.3+ firmware.
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