Great post and it is hard to out talk an old retired professor. The world is a classroom or so we seem to think. The processor seems to be "really smart" in that the jumping of the ICONS follow the ID of the target but as you indicate we see why they stress over an over a solid threshold. I was a confirmed Semi-auto threshold person back "when" but after a lot of testing in the field and at home converted to Manual Sensitivity. Just a click or two down will just about always settle the stability down. I realize stability depends on the user since what I think is stable may not be to someone else. However, the depth is tremendous when the detector is adjusted properly.
By the way I really enjoy they way you think the operation of the machine through. I read your post on this and the other forum and it is clear you have a serious interest and take a close look at what the detector does. I see no reason to claim the machine will walk on water but rather to know what we can and cannot expect. The Explorer is a great machine so no matter what the outcome we are using a heck of a great machine. We may walk on water but if we drop our machine it is going to sink.
HH, Cody