> the musikmesse is opened to public on saturday 09th of april.
> there is a shop in frankfurt which sells doepfer stuff,
> it is "musik-schmidt". they also have an internet presence,
> just use your favorite search engine and try
> "musik schmidt frankfurt". i don't know if you can
> buy stuff from doepfer directly at the musikmesse.

No. That's not allowed due to the terms of business of the Frankfurt fair.
You would not be allowed to leave the Messe with equipment (controls by the
security personnel at the Messe exits !).

From my experience Musik Schmidt has not big choice of A-100 modules
available (only standard systems). As far as I know they order single
modules only if they are ordered by a customer. So you should order in
advance if you want to pick up single modules from them.

Best wishes
Dieter Doepfer