Have been playing around with the V4 settings to try and define a program that suits my ears and gives a reasonable response. This is the first time that I've really played with negative discrim and came up with the following:
Edit of GMP Prog2.
Frequency. 12Khz
Sensitivity 90 or higher 9" Coil - 82 on 13" Coil)
Reactivity 2.5
Silencer -1
Iron Volume 3
Audio Response 4
Discrimination -3.1 (negative)
Tones 4 T1-202khz, T2-202khz(0-14), T3-603khz(15-59), T4-993khz(60-99)
Profile set to XY with x8 Zoom
GB used pumping and came in around 67.
Interestingly, placing a piece of iron on top and below my test coin (American 1/4 Dollar) the signal was still clear and crisp. This may not be as feisty as Hot but certainly impressed with the additional features.
Nice one XP, a thumbs up from me

Kind Regards
Ju