DB,
You got lots of good advise from the guys. No one mentioned the way I pinpoint (without turning 90 deg.). When I get a target, I:
1. note where I think it is in the ground
2. move the coil 6-10 inches to the right, then press pinpoint
3. I slowly bring the coil back to where I got the signal, moving slowly left-right-left-right smaller sweeps until I have the loudest spot
4. stop on the loudest spot
5. pull the coil back until the sound stops, keeping it aligned right-to-left, push the coil back onto the target just enough to get a strong signal
6. Important: the target is not in the center of the coil; it is half way between the center and the tip of the coil.
This is much easier to show than explain. It works great for me.
If it is real junky you may have to lift the coil a foot, then hit pinpoint and quickly come down to where you got the signal. If you hit pinpoint over a signal it will sort of go into "reverse" where everywhere except the target gives a signal. You will quickly learn this.
The Sun Ray Probe will get a coin at double or triple the depth of regular hand-helds. Up to around 3". It is the best. Plus you hear it right through your headphones. You can use disc. or pinpoint mode.
Hope this helps and HH - BF