I've seen at least one pedal that contained 2 effects in one box that had a "series/parallel" switch on it. Does anyone know how to do that? I'd really like to know. Also, is it possible to wire a toggle switch to switch the order of two effects in series. In other words, in one position effect A would be first, then effect B. And in the other the order would be opposite; B then A. Seems like it might require a 4pdt toggle, but I can't quite get my brain around it.
Have you checked the Juggler?
http://www.geofex.com/Article_Folders/juggler/juggler.htm (http://www.geofex.com/Article_Folders/juggler/juggler.htm)