I think I´ve understood your method and last weekend I´gave it a try; it was the Reggiane 2000 an Italian WW2 fighter with the opinion to do also the Re-2001 (other motor).
So far, fuselage , wings are done, cockpit, nose are also ready (not on the photos) noseparts top and bottom are to be done, spinner hmm will borrow one...
resource was:
http://richard.ferriere.free.fr/3vues/re2000_3v.jpg
The problems (okay, I´m not very experienced in doing GIMP, I´ve only done some improvements of family photos):
- I`ve separated the parts in different pages, adding them together to the
right scale was an trial and error action, no concept....
- no plan to get the colouring
- glueing line of the fuselage parts is on the side not on top or bottom, except
the rear part, but it works (know how to correct it, its some move,
we`ll see)
-have to rework the wing to fuselage section
all in all I´m satisfied, but stopped me building others