Excellent points rst. Years back Bill Baxter who covered the companies involved in gold exploration and production stressed drill core results are not enough, the metal must be able to be extracted economically. Environmental considerations could also negate any good core results. A geo friend of mine here in Reno told me that the famous Comstock Lode in Virginia City, Nevada under current environmental extracting standards would never be permitted as the process required to extract the silver would be an environmental hazard.