I don't think a personal attack is in order here! I knew Franz and Hiya quite well, stayed with them more than once in Surrey, we talked up a storm and I even flew with him in his ME-108 (Nord) C-GRIT. I'm not doubting something happened with the B-17F but putting Franz in the exact time and piece of airspace is iffy at best. The JG27 "Schawrm of Liars" doesn't help in lending credibility. There's lots of fishing stories out there and many make it into print like Bruce Carr's evader story and Roland Sperry Flying Tiger fake aka Capt Incredible. Here's one with a website and that made it into a feature article in Flight Journal magazine.
http://forum.12oclockhigh.net/showthread.php?t=13227