My personal opinion is that if a load out has documentation that it was used in combat it should be allowed in game. Additionally (again this is just my opinion) I think factory documented field modifications or kits should also be allowed. I find HTC's current position on field mods a bit unusual given what we currently have in game.
I think that a perked ordinance system like what Karnak mentioned would be a necessary addition.
This is what TankAce doesn't understand, his view is the P51's bomb and rockets were "Rare" except they were USED in combat, where the C.205's Bomb option was not used in combat (far as much documents I can find).
What I tried to point out to help him understand is, just because the P-51's bomb/rocket combo was rare, it doesn't mean it wasn't used, the mission of the P51 was as a long range escort fighter, it had no need to carry ords as the P-47 and P-38 were religated to do the ground attacks instead of the P-51.
The C.205's carried like 300lbs of bombs/fuel - except the bombs were never used, I don't even recall if they were ever fitted - from all the books I read I surely would of came across it. And the drop tanks were available and stored, never used because they were intercepting close to the airfield, and not needed the extra fuel.
I draw the line between "used in combat" and prototype, what he's suggesting is to add a bomb to the C.205 - however none except prototypes ever carried them. Perhaps it could be added as a perk option, I would certainly be against it.
As for a perk ordnance option I certainly agree with it, if it costs me 2 perks to use DT's on a C.205 then so be it.