A while ago I did a quick post about traditional sash joinery and the tools in the craft. I had a really good response about it, with lots of people wanting to know more, specifically the order of production and the precise nature of the various planes and templates.
These things are pretty hard to explain over email, so I was very pleased to stumble on this wonderful video, put out by the Arnold Zlotoff Tool Museum.
sash joinery
It’s a great little video and beautifully shot. It also shows the detail of how each part is made and the order to put things together. Absolutely wonderful. I hope this helps explain a few things for the people who asked. Enjoy!