Claus Osche and I visited Horst Schillat two years ago . He was a great Guppybreeder from Berlin. We talked about the "good old times", he told us about his breeding practice and we looked happily in his old full-glass-tanks. It was really interesting to see his breedingroom and learn some "oldschool breeding tricks", such as you can read in "All about Guppies" (Whitney/Hähnel).
I like this "retro-style" of guppybreeding! Here you can see two pics of this visit:
Claus Osche (left) and Horst Schillat (right) discussing about some speartailed guppys.