Ah yes, I remember the days when the F19 and F19A were supposedly the worst kept secret in aeronauticsI wonder if they ever did exist or if they were just an elaborate scam to keep soviet spies barking up the wrong tree after all?I don't think I've ever seen anybody base a transformer on one before, oddly enough (though I did copy that dorsal-mounted engine design for the cybertronian mode of one of my own characters once) - very nicely done