Lindbergh as Postwar test pilot? Fact or rumor?

Many sources claim that Charles Lindbergh “test-flew the Lockheed P-80” as well as a number of other Postwar USAAF aircraft. I can readily believe that he was invited into the left seat of B-52s while in flight–he supposedly did a fair number of B-52 missions as a guest USAF officer–but I have my doubts that Kelly Johnson would have let him anywhere near a P-80, which had already shown its propensity to kill pilots unfamiliar with its accelerative characteristics. Does anybody know different? I’ve never seen a single photo of Lindbergh with any of these supposed “test aircraft,” andI can’t imagine that the AF would have neglected the opportunity for such a photo op.

Same goes, in fact, for the oft-told tale of Lindbergh having “been allowed to fly the Bf-109” before the war. I don’t think that ever happened, and the only photo I’ve ever seen in that regard is one of him sitting in the right seat of an Me 108. Can’t imagine that the Leica-ready Luftwaffe would have neglected that opportunity either. One reputable source that I’ve read says that Lindbergh “was allowed to sit in the cockpit” of the -109, and I think that’s where the legend began.

Yeah, I know, it says different on the Internet, and we all know the Internet is never wrong…

(I’m doing a Lindbergh book, by the way, so I’ve viewed a scheissload of Lindbergh photos and read every legitimate bio of him that’s out there.)