Have often tried to heat relieve strains in plywood once glued and clamped in place by gentle heating with a heat gun. Never sure just how good it works, but as they have not sprung apart have assumed it is fine!
Am building a pilot boat model that has a pronounced rounded bow to support a substantial rubber buffer.
Was wondering how to do this as was reluctant to try the usual wood block sanded to shape approach.
Decided to cut a length of thin plywood (1/16") to the same depth as the inwale. Held this in a steel tube bender and applied gentle heat. Low and behold the ply gradually relaxed and took up the shape of the bender.
When cooled the wood was released and most of the shape is retained. Was then cut to length and glued to the frames and bow support, where it fits nicely.