Pictures...
 

This is how I fixed the roof sagging. Works just wonderfull. Perhaps the only drawback is the weight added to the bow, I guess around 15-20 lbs.

JJ did you fix what caused the problem? I would suspect you were taking water into the laminations of wood from someplace. Hull - cap joint screws in to the top not sealed some accessories mounted on top without sealing well bow pulpit or anchor tie down bolts letting water in.

There are ways of repairing draining it out, drying it out epoxy formulation into the wood (injected) if small area.

Willy, that was no easy fix by repairing the existing FB beam.
It broke at the very corners where this side to side beam meets the two fwd-aft beams, under and along the sliding door. It is just a weak design from factory.
Also, glueing and repairing against gravity ( upside down ) is even worse.
The wood inside the beam is still strong, when I drilled it, wood came out clean.
I though about this problem for months, and one day, "the bulb lit".
JT