I have an old down-easter lobster boat. My hardtop pitches to the bow and has a slight round to shed water to the sides. My top is just layed up 1/2 plywood and is stiff enough to support my weight even when i stand at the end of it. My kids jump off of it all summer long. Two 1 by 2 boards run the width of the top to stiffen it up. They are shaped to create the slight rounding to shed water to the sides. You tube fiberglass if you never have done it before, really nothing to it. When you mount something on your hardtop use 100% silicone caulk or water will get into your plywood. I have a canvas that encloses the back of my hardtop. One thing I wish I did before I redid my boat was put in a sliding window in. It gets really hot in the cabin, even with the canvas off. Really nice in the winter, I keep the wheelhouse 70 degrees. I find my hardtop catches the wind like a big sail even in Seneca and Cayuga. It makes it more difficult for trollin but that probably because I suck at fishing.
Nice website, glad to see your using the Capt. Lic