You could try spiling the carlins.That is scribing the contour of the deck on another piece of scrap,then transferring that contour to the carlin. Cut along that line and you have a fit .No stress on the hull-just a true fit to add strength,not stress . Could you do a little steam bending to fine tune them? I'd worry a little
> about steming the glue apart if it's water soluble. Maybe just clamping
> them in a jig that bends them past where you want them, and letting them
> sit for a week or so would work.