The mod/position show in the picture is for my 6a with the 8 inch coil. The control box in that position with the 8 inch coil is balanced perfect. I have another 6a mounted higher up on another straight shaft, with the 10.5 coil ( or when I swap out and use my Sunray FZ 12 inch coil), and the control box is, above the elbow mounted, which is better balanced using those bigger coils.
I beach hunt with the 6a's and strictly tone hunt, digging everything but small iron.Yes,, I have been known to chase some deep, bigger iron, but some of those chases were deep silver ! I don't use the pin point button, so for me, these set ups are perfect since I never need to look at the meter.Only thing I do need to do every so often is check the ground balance and sensitivity level. Unit always stays in salt mode and discrimination level 0 when in the wet sand or suds, and if I venture into the dry, I switch to normal mode, re-ground balance and away I go.