Sorry, Fabrizio, for the delay, and thank you for your patience.
The best solution is, indeed, a scaled deck; note the XC deck is the B-17's:
Fiat RS.14 float plane:
Deck: XC(80%); Hits: 23; ceiling: 7; climb: 7 HR: 3
Guns: Dorsal turret: A/A, 306 high only; Waist guns: 3-5 O'Clock and 7-9 O'Clock high to low, A/A.
First models: some might have a front gun A/A front arc high to low. Some of the second batch replaced this with
2 nose guns, A/A 1-2 and 10-11 O'Clock high to low.
Gun manning is a question: wiki says 3 crew; a russian source says 4-5, which makes much more sense.
Front gun(s) is the observer/bombardier's job. The turret is probably the radioman's job. If their is a 5th
crewmember, he gets both waist guns. Otherwise, the RO does that. He better be fast on his feet!