Sorry if this has been mentioned im in a rush to get to work and didnt have time to read 4 pages but i believe i may know the issue for the drives not working.
Although i havent tried lt 2.0 as i sold the 360 with my v79 in it, i did however have a similar issue getting xgd3 originals to work.
Basically it was an old banned elite that i took the benq from for 0800 and replaced with hitachi v79. As it was an old console from the ban wave of 09 or whenever it had an old dash so when i flashed 1.91 to the drive the 360 didnt recognize it nor did the drive.
So i had to flash it to stock, insert xgd2 game with the dash update that reflashes drives to the revisions that can read xgd3 ORIGINALS, reflash with 1.91
I used Dead Island (xgd2 version) to do the update and after that the xgd3 originals played fine as well as xgd2 backups.
So for anyone having these issues if you are using an old console and or old drive you will have to sign into live or use a recently released ORIGINAL to update both drive and console to recent dash before the firmware will work.
Please note you do not need to spoof the drive to do the dash update that flashed the drive as it will not update all you need is your drive key and DO NOT USE A BACKUP to do the update as halfway through it will reflash your drive with stock firmware and when 360 reboots it can no longer read the backup then your stuck in a half update and may not have the original to complete update.
Sorry for the rant and hope it makes sense i sorta confused myself a little bit as well
