If it were possible 50 cycles would have publicised it regarding their Kalkhoff S-class sales.Dave you've been asking me the same question for many years. The only way you'll get the answer your looking for is if a)you figure it out, b) I'm working for you, or c) you're working for me.
I think a) is best for both of us for the time being don't you?
Have you sold any S-class bikes?
KudosDave