Full erection of this French architectural masterpiece was completed this week in the private California hillside retreat behind Sosie and Bill's canyonland home near Sunol. The stylish weatherproof fixture, acquired from the prestigious Costco firm, went up relatively easily, Sosie says. Engineer Bill had no comment. He continues to remaster the entire barbecue area, watched closely by Snowball, the white cat perched above the work area.