I'd be very interested in this one as well. I've heard about the furnaces before, from Gary among others. I'm gonna do a quick search on them as well. -- For the forseeable future, my Saturdays are unavailable for a day trip, but just about any Sun. will do with a little notice. Perhaps one of the May Sunday's between Mother's Day and Memorial weekend? I wouldn't expect the heat to be too bad at that time either.