I thought of a different way .....
Thinking about my previous post with angled dados with same width "splines" idea, I came up with this. Make a plywood gluing form with the correct seat, back and floor angles having open spaces from rails running lengthwise, rather than a solid seat like supports. Have stop blocks for your basic dimension, so when you make your glue up laminations they are the correct distances apart. Start laminating 1" X 3/4" strips in the shape of the chair, overlapping them on the ends as you go. Some strip will need the correct angles precut on them. These will get trimmed off after it's all done. Continue to build across the width with the strips attaching them to the previous ones which have set up. You can make it as wide as need this way and the alternating strips will form their own finger joints without having to cut individual dados. It will still look like angled finger joints, but made with individual strips.
It will look much like this:
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
Last edited by woodnthings; 02-28-2018 at 09:05 PM.