So here is my take, though others may disagree.
I actually got a little sloppy with my sawzall when removing these stupid little strips of wood that were used as core material to fill the strakes, and punctured my hull. I decided to fill all those strakes inside the boat level with hairy PB. The strakes that we’re not covered by the stringers were then covered with a layer of 1708, and a layer of roving. On the bottom of the hull, I simply ground back the gel coat to a taper an inch or so then added gelcoat in several layers until I was heavier than the surrounding gel coat. I then sanded everything and blended that area.
My point is, the idea is to stabilize the repair and keep the crack from growing. This is why you vee it out, fill, and add layers on the inside. You don’t really care what it looks like on the inside, so you can bulk it up as much as you want and really tie the areas around the crack or gouge together. Once you cover it with the deck, it’ll never be seen. Try saying that about adding layers to the bottom!!
Me personally, I would not add glass to the bottom unless there was a major repair necessary. I don’t really consider that crack to be major. Just my opinion.
