It's just the one Delrin brake, and it's been in use since the 1970s. You don't even see it on the display back models, since it gets swapped out for a prettier metal piece. And if you're a Speedmaster purist of the Moonie cult, it's a moot point, as only the column-wheel Cal.321 is the one true movement!
As for reactions to the THC's tiny engine, I'm guessing that displacement fetishists aren't limited to the automotive world. The concerns about the chrono module, on the other hand, are well founded.
Here in the Philippines, the going rate for the Heritage is ~USD3500 from an AD, which is considerably lower than it was as recently as September. Prices were close to USD4000 back then.