I'll keep this short. If you see a place that looks like it would have a lot of potential to detect, never hesitate to seek-out the owner and ask permission. The worst that can happen is they tell you know. Today while working I asked the owner of a former pre-civil-war era Fort, that has never been detected to his knowledge, if I could come in and detect the oldest part around the buildings that were built in the early 1800's. The nicest gentleman ever, he said sure, but I have to sign a Liabilty Release in-case I get hurt. No problem! I'm excited at the potential here. There are underground pipes he said that may interfere with my MD, so should I drop my sensitivity down? Any ideas from the experienced ETRAC users?