Gary, At Lockheed Martin Aeronutronic we also flood (no thermal relief) vias. We do have a thermal relief in the data base, but we give photplot instructions not to plot that size apertures. (The thermal relief aids in checking the design data base). We have found this especially beneficial on copper invar copper boards as we want to maintain as much copper as possible in the planes. Dianne Boehm (714) 459-4490 Lockheed Martin Aeronutronic Rancho Santa Margarita, CA