AT Pro I have a broken stock coil I will be replacing with the Viper coil later on. I also have a nel Big and Mars Tiger.

My other machines are:
Seahunter MKII with stock 8" mono and 10x14
Tesoro Tejon and Cibola with 8x9 concentric, Cors Shrew, 8x11 dd, 10x12 widescan dd.
Makro Multi Kruzer with stock 8x11, 5 x 9 1/2 dd, 9" concentric and 12x11 Superfly
Makro Gold Racer with stock dd
Ace Apex with stock viper, 9" ultimate and Reaper (for sanded beaches)
Started with an old Bounty Hunter back in late 80's

Much of my old site hunting is done with the Tesoro's and usually a concentric when there is a lot of iron present. Widescan is a deep coil on the Tejon and I use that in less trashy more open fields.