Understand your frustration.
Trying to get a better handle on whether you are experiencing a setup issue (due to general detector inexperience) or an actual detector issue.
How much experience do you have with detecting in general and beach detecting in particular? What other detectors have you used? How many hours do you think you've put on the Equinox?
I probably have around 3 or 4 years detecting experience in total but maybe only a few months beach hunting. I had a CZ21 and a Makro Racer before this and have used a AT Pro on land. I guess I have put in around 50 hours on the beach with the Nox.
When you met the other Equinox user on the beach did you compare how the machines behaved side-to-side before and after the machines were set up with equivalent settings? You never said what those settings were.
The guy I met on Sunday with the Nox went through each of my settings. He ground balanced and noise cancelled it first. The settings were; Beach 1, Vol 25, Threshold 0, 5 tones, Accept/reject default recovery 3. Sensitivity...he put it on 22, the same as he was running(at this point I thought this guys nuts!) I have never been able to have it above 16. Unfortunately he was packing up to go home so I didn't ask him to try my machine, wish I had now. The sensitivity was the only setting our machines differed. I started detecting and it went nuts, falsing, numbers all over the place. He told me he had been running on 22 and his was pretty stable. I had to turn mine down to 14 to get anything like quiet. It was then that I knew somethings not right.
Understand what JoeVal is saying above, but regardless where you are using it, Beach 2 is designed to be the most stable of all the Equinox detecting modes. It is perfectly ok to run it in shallow water, it should run stable in wet sand, but if you can get away with it, slightly less stable Beach 1 can be used also. If you cannot get either Beach 1 or Beach 2 to run stable at all in wet sand, there is likely an issue with the detector or severe EMI.Yes PI's are simple, deep, dig it all machines. Deep bobby pins are always fun to recover.