Yep, it's generally much more precise using the "pull back" method.
The signal is maximum when the object is directly in the center of the
coil. Some can pinpoint that way, but I never did. It's generally too vague
to me unless you are really used to it.
Only the sniper normally pinpoints in the center, and with it, the coil is small
enough that the vagueness is not an issue.
I never really had any trouble pinpointing with the ace 250 from the start,
except for the cases where the signal wants to wander towards another
target, or to hot ground.
Detuning and shrinking it down will usually let you get those.
As far as a normal un-bothered signal, I can usually stab the coin
in place most of the time. I'm quite a bit better at it now, than when I
started..
Most anything I dig, I make very small holes to find, unless it's really
deep. My normal digging tool is my blunt screwdriver probe.
I almost never use a standard digger. Whacks the grass for a loop
compared to a probe.
Anyway, to anyone having trouble, I *double* recommend only using
the "center and pull back until the tone quits" method.
And the secret to stabbing coins is being very careful on the side to side
centering right before you pull back and lose the tone. That side to
side area will continue to shrink before the tone cutoff, so it's real
important to be checking it all the way back to the cut off.
If you only check side to side in the middle, it's quite possible to
be 3-4 inches off to one side. This is no way to live.. lol :/
If you do that, the object will be right in front of the inner coil, just to the outside.
Only on pretty deep objects might it be a bit farther back.
The depth indicator can help on deciding that..
MK