I recently heard of setting the threshold to 1 on the gpz. At first I thought it was a ludicrous idea, so on my last outing I decided to check out for myself. I usually end up in moderate to hot ground, mainly on account of all the magnetite in the dirt. I did my ground balance, set the threshold to 1. Zero on smoothing, 17 on sensitivity!! (Crazy) general and normal....I found five nuggets that day! Nothing huge.. 2 grammer was the biggest piece. I was just surprised that I hit anything with that setup. Detector ran dead quiet until I hit a target. Anyway I'd like to hear other pros and cons on running a virtually nonexistent threshold