I absolutely loved that video. Never seen it before. Awesome. I certainly would put to use a 5 axis CNC.
I must say that I prefer mortis and tenon over dowel or floating tenon. Not saying it can't work but the former sure seems a more long lasting joint. The chair makes me want to see if I can steam bend those curves rather than just cut the shape into the wood.
All the leg joints are mortise and tenon and pegged from the inside. The back support is connected with dowels. It is a very rare place that I use a dowel for joinery but for that use it is plenty sufficient.
What is the height at top of chair back? I'm interested to know if it's easy to make this design slide under a standard dining table height (say 29 inches). Earlier this week somebody showed me a Maloof design that does without modification. If you have a moment could you look up what the height was?
Sure Ezjack, I don't claim any chair design as holy or sacred. Like the Shakers. Use it if you please.
The height is 32" approximately. I think the angle for the bend from the back legs going into the back rest was like 34º. It has been a bit since I made this so could be off. The best angle for casual dining is usually about 12º in relation to the seat. Seat drop is good at 3º front to back.