I was always planning to tape the inside seams with 4oz eglass, was
just thinking about not glassing the whole inside with a single sheet.
High center is not something I had thought about... Beach takeoffs and
landings could create that situation. The wood I am using is 1/8th
Okume and I wonder if an extra 4" strip down the keel line would
suffice on the inside assuming Im a carefull paddler (could still get
into rough conditions though)

Found some good info on stress tests done for cedar strips but none of
them were only glassed on one side.

Manufacture is liable if I sink and die based on their reconmendations
so they can only say to follow the directions.

Thanks for all your posts so far