Here's how I scratched together the oval aft fuel tank. All it takes is a rectangle of .010 styrene and a semi-oval shaped stiffener for inside the rolled sheet.

June Group Build--Curtiss Hawk 75
After you build the front face of the tank it'll look like this glued onto the bulkhead. This bulkhead is a scratchbuilt piece for one of my old Monogram Tomahawk projects.

June Group Build--Curtiss Hawk 75
The final step is to paint the tank and add two mounting straps to the face. I used bare aluminum on this tank but they could also have been the same color as the tank--check your references for more details......

June Group Build--Curtiss Hawk 75
My "Curtiss Assembly Line".


June Group Build--Curtiss Hawk 75