OK so I tried flashing the PIT file with just the Firmware (CSB_signed_HLTE_EUR_OPEN_32G_0718 with N9005XXUDMK2_N9005OXADMK2_N9005XXUDMJ7_HOME) and I got it back. Basically I flashed a PIT with firmware & modem in ODIN, which failed to boot past the 9005 screen. Then flashed the PIT & firmware above which brought me to a message that the internal data was corrupt and needed to be formatted, so I chose the only option (wipe it) and after a stock recovery wipe everything booted up normal.
This is all after a dozen or so attempts with "invalid ext4 errors, modem flash errors, unable to mount USB to wipe in recovery, etc etc. Anyway, I have the files if anyone ever thinks this could help them. It was an early release demo unit for Samsung reps, and it belongs to a friend of mine who works for Samsung so I was really nervous that I really hard bricked it. Thank you XDA for the dozens of threads & hundreds of posts that helped me get this phone back up & running!!!!!!
CURRENT:Galaxy Note 3 [Xposed]; Galaxy Note 2 [Int'l Xposed ROM]; LG Optimus G Pro; Galaxy Express [Xposed]; Infuse 4G [CM10.1] RETIRED: Galaxy S III [Task650 JB]; Galaxy Note I717; BB Bold 9900 [Hybrid 7.1] iPhone 4s [jailbroken]; BB Playbook; Galaxy S II [AOKP]; Moto Atrix 4G [CM7 Ba2tF @ 1.3GHz]; Samsung Infuse; iPhone 4S; Captivate [Serendipity]; iPhone 4; BB 9800; HTC HD2 [CM7/WP7/ICS]; BB 9700 [Homebrew Hybrid]; BB 9000 [Hybrid]; iPhone 3GS [Jailbroken]; Nokia E71; HTC TyTN