We use Schallers on request, and find them to be of nearly equal quality to the Gotohs.
Matt is referring to a time when we were back on Foley Street. Nobody could get Schaller tuners, and all the distributors were out of stock. We were really not excited about the Gotohs at first, dismissing them as a Japanese copy of a Schaller. But after testing them we were really impressed, and have used them ever since.
Since we know we'll be using a lot of tuners, we order them from the factory and have our decorative A on the back. We always list it as either a Gotoh or Alembic-Gotoh tuner. I've seen other makers do this, and not always reveal where the tuners are actually made.
We have customers that even supply their own tuners, some of which are extremely expensive handmade creations. I'll have to find out the details of Paul's custom Series II guiar tuners.... I think these cost him about $500 for the set.
The tuning machine is one of the few parts we don't make ourselves... who knows, maybe someday!