Framebuilder/YouTuber Daniel Yang just posted a video where he visits Maxway, the Taiwanese framebuilders that produce steel frames for many brands, including Rivendell:
Around 6 minutes in is footage of their brazing shop, where we get to see what are clearly Platypus frames being brazed and then going through final frame prep (seat tube slot cutting, reaming, BB thread chasing, etc.).
Thought it might be of interest to many here. Maybe one of those frames is your future bike!
Jeremy Till
Sacramento, CA