As Sfire suggests- the B-17 group build look into it......there is a resin bbay kit ,tough to find ,after seeing it on line I opted to build my own bbay detail. There is a lot of very small parts to fab and detail out. I intend to use the eduard bbay doors and scratchbuilt the rack and other details.Compared to the rest of the plane ths bbay is very much less work. I am into the visible 1/48 B-17 here are a few pix. The bbay in these Monogram kits is ok but wont stand up to comparison with p/e and resin sets,therefore the kit bb assy must be scratched or heavily modified.
Scratch built bbay racks as the kit ones are too tall...