Thanks, Steve. I've tried a sit on a plank spanning the front and rear stretchers, but that raises the seat position. I might try wrapping some paracord around the stretchers for another test, but that will sag more than a woven seat. I might need to wait until it's fully woven to get my first realistic test sit. 😀 My worry (and I should have taken some measurements as I was designing) is that the arms might be too low to be comfortable with the seat height. Time will tell.
I need to finish all the sanding before the final glue-up.
Yep, the job isn't "finished" until the paper work is done!
Like the way you have the hinges over the cord, will make it easy to swap out when you find the final solution. So the chair back just automatically adjusts to your back when you sit?
You'll need to do a review of which of the chairs you built is the most comfy!
The hinges over the cord was likely a necessity on the original because if they were mounted to the frame first and then woven over top, the pivot pins couldn't be inserted into the arms afterward. Also, the pin would be an obstacle to weave around and might disturb the pattern of the cords.
The original has a leather strap that connects the bottom rail of the backrest to the narrow stretcher at the back. It provides a limit to how much the backrest can tilt backwards, having a bit of flex compared to some kind of hard stop.
For comfort, the Z-chair remains at the top of the heap so far. I love that chair.