Thats a good question. I keep telling myself that I'm not putting much more into the boat then I already took out. The fiberglass panels I'm putting in are lighter then the glass from the inner that I took out. The 1/2 inch plywood floor is the same as what I took out. The balsa did not weigh anything at all. A little glass over that. The transom cap should not weight more then the old transom and seats that I removed. I did add some extra glass to the transom itself. There are other factors. The fuel tank is twice as big as the old one. So it's really crap shoot but if I had to guess the boat will weigh between 400-600 pounds more then it did before I started not including added fuel capacity.
All the seams are ground down to accept glass to bridge the seam's
Around the perimeter I ran a very wet bead of cabosil in the seam.
I let this set up a bit then ran 1" tape over the bead and some resin over the tape. It smoothed out really well.
It's coming along slowly but surely. This weekend I'll be sanding and fairing the seams to a smooth finish. The transom will be sanded and faired again. Also I hope to get the bilge ready for primer by finishing the work that needs to get done for the fuel tank, Seacock and bilge pump.
Strick