I’ve wanted to build one of these since reading Tage Frid’s book on woodworking. Ash posts with a roof timber beam pulled from a skip.
I used Paul Sellers’ knuckle joint method for these - in retrospect I think the saw in some of Tage Frid’s photos is a better bet.
You can see the tenon is all the way through the beam in this photo, which I think is an easier joint and would be cleaner for someone like me still building their skillset.
Still lots of shaping to do but I’ve got the weight down to about 1200g. It cuts beautifully quickly and nice and straight, with a dead thin kerf.