THE FIN IS IN!!!
I cut the Front and Rear Sections from the Interior and Shaved a little off the Bottom too.
I cut a piece of sheet plastic to cover the front area removed from the Interior, and glued it in place...
Next I Cut Off the Back Section of the Bubbletop and glued it in place as shown. Then I Sanded the area smooth.
I cut the BiG Fin from sheet plastic, sanded the edges down nice and sharp, and glued it in place!