i recently got a barely used bhid, and am loving it. I'm thinking that the gasket and battery holder cover probably should be replaced every 2 or 3 years as a maintenance preventive, no?
My coil floats, so I took a a small bean bag with shot inside (from a dive belt),and a velcro strap, I just strapped the bean bag to the shaft above the tightening knob and it is perfectly weighted in the water. The velcro removes in an instant if i want to do dry sand. Not ideal, but covenient enough.
Ground balance in All Metal mode.
I found it has amazing depth in all metal. The ID lights work in All Metal mode. However, AMM reaches far deeper than the discrimination feature can handle, so deep signals are not identified.
Within the depths that Identification works, identification accuracy seems best at mid depth. If a signal is very strong, I raise the coil a bit to get more info on the id.