TM Stock
The Stay-Set was apparently designed to allow a quick removal, touch-up, and back to work, but not sure there's really much time saved...although I only used it for a few years, I don't recall much of a delay in setting things with a conventional capiron. Seems like an opportunity for some CNC-driven youngster to get into the business of two-piece capirons for those jonseing for the Stay-Sets..

Re: coffin sided smoother plane blades...1973...this was 20 years before the Web became a useful and common utility and a couple before FWW's kick-off issue, so other than a few old books in the Clarence public library, you had to find one of the older guys to get answers to most questions, or just puzzle it out yourself. First compound dovetails (first dovetails, actually) were like that in 1969 - had a girlfriend that wanted a small, angle-sided box to keep her stuff in, and an example to work from was in the town's second hand and antique store. Clarence Center still had a mill work/lumber yard next to the Post Office and a scrap pile out back, so it got done. Had I known it was supposed to be 'hard', I probably would not have tackled the project.