Makaha, I also use Whites PIs. I have an older one maybe 10 years old regular surfmaster PI. I also have a Surfmaster PI Pro that was further modded by Mr Bill. With the older one, I was still finding more jewelry that CZ 20 (of course) and Excal, but the excal guys sure do find some jewelry. I do dig more than them, but they do not go as deep. The Pro will find a broken, thin alloy ring, where most MDs wont. Fine,thin chains are a problem, as they wont pick up until you brush the coil over them. If they have a clasp it will though. You will dig more junk, just keep it all. The guys with the discrim pass up a lot of gold, as it is discrimed out. Appraently the excal will still discrim and still find gold alloy. but not as deep by far. By the way i used to live on Oahu, North shore just past Sunset Beach,in 1975 and 1976. We drove through Makaha, even surfed there. We went through to hike up above Keana point, up into the mountains. My neighbors were in the military so we could short cut through where they did all the rappeling and bombing. Hang loose brah! Steve.