Maseo, the bending loads from the motor acting on the transom will put tensile loads in the inner skin, so ideally you'd want more than 1 layer on the inside. I think we used 3 layers on inside of transom on Skip & Carla's boat, based on recommendations from a really good professional fiberglass guy. If you have any future repairs done, it'd be good to run 'em by this forum first! However, what you have now is undoubtedly a lot stronger than what you had before with the rotted wood core, especially if the guy used epoxy resin! Your new core will now carry the loads that were probably carried by the glass skin on the old one. These boats are so overbuilt that you should be ok, especially since you're not racing it! Denny
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