Spareparts:
I have done some investigating but counterweighting off the fulcrum point of the hull is difficult. If I have someone weighing 250 lbs standing on the back edge of the casting deck up front. The water line on the hull is even with the water surface and it raises the stern appx 1 to 1 1/2 inches.
Unfortunately the dual batteries are as far forward in the console as possible , actually they are in front of the tank directly under the seat in front of the console.
Here a pic that may help
Don't worry about project completion. I have replaced many a soft floors before and know whats ahead. Just not sure the hull is strong enough without the bracing the fore deck offers, as the bow flairs and just above the water line where waves often break when running hard.
Kamikaze