Thanks Mark. I'll try that but I'm guessing tension on the forestay will just bring the bows closer yet. Last ditch effort may be to wallow out the holes in hulls where the rear crossbeam mounts until the bows come out a bit, then shore them up with a little thickened epoxy. The measurements you suggest should help alot with that. I think I will try everything else first and save that as my winter project.
And thanks for the reply, Jake but P-19s have symetrical hulls.
Salud