in the p51b there are pylons on the wings showing...
i dont knwo a ton about ponies, but were the hard points permanant?
i know in the new 190 model, it is an actual object, you skin it with the airframe, but it is not attached unless you load the DT / bomb.
maybe it is that way with the p51, the hard points show and are modeled into the drag only if you load those objects