Inspiration arrived at my modeing desk (in my brain, more accurately). I couldn't figure out how I was going to build up the fairing under the rudder and then it hit me---I used the other Corsair horizontal stabilizer to build this filler piece and it couldn't have been simpler. I've been fretting over this for a week or more! You can see how these pieces went together by looking at the inside of the fuselage. More trimming in here will be done when making the tailwheel well structure.
SAAB B 17A In 1/48 Scale
And the final profile of the fuselage is now complete:
SAAB B 17A In 1/48 Scale
SAAB B 17A In 1/48 Scale
Here's an inspiration/reference photo from a source I can't remember now. I'll make every effort to find the source and post it when I find it.
SAAB B 17A In 1/48 Scale
And, just for fun, an unmolested Corsair fuselage and the B 17 conversion for comparison:
SAAB B 17A In 1/48 Scale
Next will be to design the horizontal stabilizer mountings and fairings and then to move on to the wings.