Oh, I'm soooooo picky I drive myself crazy. If Dad did one thing thoroughly, it was raising me a perfectionist! Sooner or later (always "later") the anal-retentive, obsessive procrastination wears me out, and I just dive in. And, it always works out well, to my surprise. AT 60 (Christmas day), wouldn't ya think I'd have gotten it by now!!!Thanks guys. You've been a real help, as always. Gonna go with a Rootlieb 4-piece, w/stock louvers.