I used to fly with someone who'd also crewed the RAF's Lanc in the early-ish 1970s. He told me that he'd met the B-17 gang once on the airshow circuit and asked, in all innocence, how Don managed to pay for the thing.
The word 'Kray' was mentioned in the reply, whereupon the subject was rapidly changed....
Clearly there most be some fascinating stories yet to be revealed.....