[flyingfrizzle]

That's why I like to replace from the inside. The outer skin is always thicker and I prefer to build up the inside so it is close to the outside thickness. Plus it is easer laying up cloth/resin on a incline leaning back vs having gravity fighting you laying up on the outside. The inside also lets you build up the tabbing to the hull and doesn't disturb the original molded hull structure. Don't get me wrong you can do it correctly either way and nothing wrong with doing it from the outside. BUT to me there are more benefits of doing it from the inside. Just like fairing. I hate fairing and doing it from the inside avoids fairing the rear of the boat. Still some internal fairing but it is not as bad as a big flat area. Another big plus going from the inside is you can build up anything as much as you want and add as much core as you want. From the outside your limited to the original thickness. You can add to the inside skin from the back if you make the core thinner long as the over all thickness is the same. If yours shows some cloth areas that are not wetted out as well I would grind that area(s) out and build then spots back out to the same thickness as before so it is all soaked as it should be. If you want to add thickness lay up a layer or two to the rear of the core before installing it into the rear. Just make sure you get a good bond between the old skin and the new skin laid up on the core. You may could do the best work going after it from the inside but if it is cut out already I would try and finish it from the rear as started. I would hate to do it twice from both sides though...