Actually the patches are programmed by Bryan Lee who I have worked with before. Torben does the excellent demos.
I purchased the Techno set and like it very much. Highly recommended… 
I have a bunch of Retrologue presets that I was thinking of releasing as a commercial bank but there doesn’t seem to be much interest in Retrologue. I may just release them as freeware or send them to Steinberg to do with as they wish…