Imput needed from M-6 users

[garyw]

I posted some questions and my findings on the m-6 and depth forum but most issues were not answered so I am asking for helpful answers. I use an mxt and last week purchased my wife a M-6. She found coins but said it was bouncing all over the place. I am trying to teach her just to by sound and vdi numbers but it takes a while I know. I used the machine a couple of days ago by myself and have some questions. I was hunting with the descriminator all the way to the left and at one sometimes. I was running the gain to the pointer at the highest position (near 1 oclock). My main issue is I get a grunt that is broken up on almost every swing. It gets shorter and more broken with the discriminator at the first arrow. (below nickels) The high coin tone signals are good and strong and the same strength and loudness if the coin is on the surface or 5" deep. Is that normal. I am finding coins ok but do not like the crackling grunt and am suprised with the signal strength of good targets. I do hear alot of weak target signals also but when I dug them some changed to iron targets and some I lost the signal or it started ghosting. I only hunted about 2 hours with it but it was frustrating. Soo much different than my mxt.What am I doing wrong? Should I be hunting in the middle switch position? instead of forward?