There was a timber flange glued around the inside edge of the gunwale before the deck went on.

The beam mounts are carbon, sort of (you'll see in the photos when I finally get them uploaded). Both natural and synthetic...

I considered carbon reinforcement in certain areas of the hull and deck for stiffness (rather than strength), but my composites engineering mate informed me that it's better to use carbon globally rather than locally, particularly in cored construction. Carbon is so stiff that it takes all of the load, so the rest of the laminate does nothing. Worst case scenario is that the amount of carbon laminated into the composite isn't strong enough and the whole laminate fails. Without knowing the design loads more thoroughly, it wasn't worth the risk. I don't like working with kevlar. Cost was also a factor, otherwise I would've gone with carbon throughout.