Airborn 1600 build Fuselage sides

I have been building fuselage sides for the last several days.
Cutting this lumber in this fuselage requires sawing each piece as a knife nor razor blade
can't cut through this lumber.
And there is a lot of cutting and fitting of all the longerons, uprights, gussets etc.
Right now I have 4 side completed and the 5th is on the board.
Six sides are needed for the 3 Airborns under construction.
With variance in wood sizes you can't really cut all the parts and just fit it together.
Each side is unique and has to be fit together.
I should have the side done and ready to sand in a day or two.
My Dremel saw and 12" sander are my best tools.
Also the pieces are so thick that you can't build one side on top of the other.