I have been pounding an old park area that has produced alot of good stuff with various machines over a long time, so one day I decided to grid a area off 3ft x 3ft and put the V3i in prospect mode and see what could I find. There is sooo much trash in this one area, its unbelievable...its very common to find 3 pulltabs in one hole and at 6" and deeper! After I dug all the really rusted bottle caps I can better understand what all the nulling is from with the my V3 & Etrac. Im going to try my LTD w/a 5" coil next. Theres got to be some gold there somewhere!