Scholl's airplanes were so heavily modified, they were referred to as "Super Chipmunks" (IIRC by Art himself). I think he personally held a bunch of STCs for those mods. I was inspired by a few aerobatic pilots, including one who revived the inverted ribbon cut (about 45 years ago) who was an aquaintance and work mate (actually, my boss's boss). Thus, my first airplane was an AA-1 that...well, I can't write any of that stuff in a public forum, but it was one strong and capable little airplane.
3NMs (Expediters) were actually fairly common in RCAF days, but sadly did not have the C45 cargo door. It was a very interesting airplane to own and fly, lived up to all of what it looked to be when I was 12.
Have spent a lot of museum time with SR71, but sadly have never had the pleasure of seeing one fly. One co-worker was the RCAF acceptance test pilot for the F104 programme, and actually taught the X15 guys "how to fly" as he was the only person in history to successfully dead stick a 104...not once, but TWICE!!!!! As a result, he was asked to do that instructing in a tandem 104. Still fly with one of his squadron mates, who is now the highest time pilot in Canada (well over 47,000 hours and counting). I have heard an awful lot about 104s from these two guys, and only read about the 71 - but if there was ever a "normal" airplane that even begins to approach the magic of the Blackbird, it is the 104. BTW: if you ever doubt the sheer genius of Kelly Johnson and his band of skunks, take a look at the shape of the wing leading edge on a 71 and then Concorde (there are one of each on the carrier on the East River in NYC). You know which one came first by at lest a decade!