My research didn't turn up anything about the Spit pilot, but it did find some interesting stuff about Rischbieter. After the war he became a DMD (dentist), and even invented a type of (patented) artificial tooth. He died in 1996. He must have been a very intelligent guy.
On one forum, one of his patients says he asked him about the war (this was in the 60s). He said Reschbieter would not talk about it at all.