I hadn't tried flashing back to TW. I didn't know if there were any special requirements to go back to 4.3JB. (I remember I flashed back to TW got a lock and then flashed back to AOSP and GPS is working. I was concerned about issues flashing back to TW4.3 and was hesitant because I got burned on my S2 flashing from JB back to ICS because of partition and bad PIT chip issues which resulted in a hard brick.
No worries going back to 4.3 and updating prl & profile update and getting a solid gps fix.
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