So I went back to the car for a drink, and swapped the QED for the gpx to see how it compared.
Settings were, enhance, fixed GB, RX 9 stab 11. Auto tuned and ground balanced, steady hum.....beautiful.
I've got to say, it was much smoother and handled the emi much better than the QED, to my surprise.
Dug a few targets, no gold. But, it did give a better response to the targets, and I put the .44 down, and it really sang on it, conceded, it was just an air test, but really positive.
Coils , on the QED, I ran a NF 14*9 evo, on the gpx a 12" NF evo.
Winner on this outing goes to the GPX4500 due to the steady threshold, despite not getting the gold.
Did a video, will upload it, although I held the phone next to the headphones, you can't hear the response.....not sure if I like the detecnix wireless phones yet.