FYI, I'm pretty sure John G was just teasing Ron. Back when John was known as Spokeshave and taught shavemaking classes, he had Ron make up special blades for his shaves.
Chuck Vance (who uses Hock irons in his #4, #7, #60-1/2, #80, plus a couple of wooden planes and has a large and small Hock/Guntershave.