FWIW, When I had troubles with the batch file, before it was updated, I updated mine manually with the following command format and it worked perfectly:
adb reboot-bootloader
Funny... after struggling for about 20 hours on and off with this, the thought crossed my mind that I could have FXZ'd back to 902 and reinstalled everything in the same amount of time, but most of the issues I faced weren't with the script, they were my own mistakes dealing with bad downloaded ZIP files. In spite of this, I still prefer the script because I'm sure I can use it again when the next leak or OTA comes out without trouble. :biggrin: