If you are removing the cap, I would highly recommend removing it from the trailer. When the cap is off, it turns into a bowl of jelly, any fiber glassing you do the hull will hold that shape. I put mine on the floor, on a 2x6 under the keel, shimmed the boat so it was square with the world, and supported the bottom to make sure there was no hook in the hull. I replaced the transom, then the stringers up to the helm. Then removed the cap, and finished the stringers up to the bow. Be sure to measure every thing 6 times, including squareness of the hull, stringer height, flooring final height, ski lockers, and anything else you can imagine. One mistake and the cap will not fit correctly. My walk through windshield would not close properly, so I figured in about a half inch sag, and added that to the floor height, and by golly it fit perfect. Good luck!