I would fit and scribe each of the 4 jamb extensions prior to assembling them into a box. I take a cheap Ryobi table saw to trim jobs and make those...
I had no idea he did any turning. Sam and his wife Alfreda collected a lot of work from other Craftsman and artists. Bob Stocksdale was one turner he...
The only other period that would compare would be 1750-1800, which would have taken you from Bach and Handel through Mozart and Beethoven to Schubert...
There used to be several suppliers of backsaw parts on the web. It looks like all of them have shut down, never really recovered after Covid, or just...