I tried the modified 2.2 OTA update with the engineering SPL.
I was able to flash the update, once it was finished the phone rebooted and the radio was installed. After the radio installed it went directly into recovery.
I rebooted from recovery and the phone has been stuck on the splash screen since (going on 25 minutes).
Here is the relevant information after the flash if it helps (the phone is a MT3G)
SAPPHIRE PVT 32B ENG S-OFF H
I flashed the perfected SPL and the modified OTA worked just fine. Thanks!