Jeaton -- I was most interested to read that you scored the flaps free to pose them on the Tamiya kit, as I'm faced with something similar on the Hobbycraft -1D.
The kit comes with two sets of flaps, one raised, one dropped, but the kit is engineered to use the dropped flaps. To fit the raised ones needs some plastic surgery to the locating tabs. So, where's the problem? The raised flaps are provided with surface detail, recessed panel lines and raised stiffening ribs. The dropped flaps are completely smooth! Why can't anything ever be easy?!
Well, I can scribe the missing lines, but the ribs would call for half-round microrod at about .010" diameter, and I don't know if anybody even makes it that small (I can check Plastruct and Evergreen), plus I just had to buy two Plastruct packs for missing details on my Tiger. GRRR.
The other option is to use the detailed flaps, cut them apart and then modify them to fit the locator tabs for the dropped flap option, which would mean building the rounded forward side of the flaps from styrene, including the notch to match the tabs... Oh, fun! But possibly less fiddly than the alternative.
Any thoughts on color for the normally-hidden portion of the flaps? In the 50s the Navy was using dark red for hidden areas, like airbrake bays, but a 1969 photo of Ferdinand Soto's plane, Honduras's last combat Corsair (a -5), shows no color change on the flap edges at all. The plane was also in an advanced state of weathering, with control surfaces swapped in from other planes, so she was a patchwork quilt of finishes (sounds like a great subject to add to my 'Football War' lineup!)
Cheers,
TB379