TeamVMG, you are right, caught in the wrong place at the wrong tide with a broken beam means your boat gets sucked through an 800m long boat shredder we have adjacent to our club...
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Good idea, that sticky tape!

I was able to find the owner's phone number and gave him a call. It turns out he already repaired it himself. There was a void between the beam carbon "skin" and the original internal reinforcement web.

Thanks everyone,
Dennis

Ps: edited (url)