Some good info. This is all looking to boil down to buying a canned tune, or find a tuner with a spare day to fudge around with FTECU without any base map to work from (unless FTECU can read the GYTR tune, which the whole chatter around "no turbo tunes" sounds like it might not.I can possibly answer some of your questions
1. It's my understanding that FTECU no longer sells their turbo tune. They don't
want to be reliable.
2. Alba does not use FTECU. I just talked to Nate a couple weeks ago and although he didn't say what they use, he did day is not FTECU.
3. As for the ecu being locked, who knows. I emailed someone at FTECU awhile back and his thought was that I could get into the ecu with their software but would not necessarily be able to see or make changes to a previous non-factory tune. Nate at Alba wasn't exactly sure either. So it would be a gamble with your license. So I returned mine before trying