Each year when Trans-Siberian Orchestra announce their winter tour, they bill it as “bigger and better” than the previous year. And every tour, they manage to deliver on that promise. “Paul O’Neill, the gentleman who created this whole thing, he was the mastermind behind all of it,” TSO guitarist and musical director Al Pitrelli told Chuck Armstrong on Loudwire Nights (Sept. 18). “I spent literally half my life with the man in the recording studio and on the road and he had no boundaries as far as production and as far as musicality [goes].” As Pitrelli described it, O’Neill never concerned hi…