Rich - i know its been a long summer for you....so glad to see you get out. Enjoyed your story....sounds like the dustbowl in Utah right now.
I have never spent time running my machines w/ the variable audio for deep targets....as i wanted to hear it bang through no matter how deep. Maybe its time to try something new and give this a try in the old parks i hit as well. Ignore some of the shallow junk....and the 59 zincolns/lincolns i dug today. Would have like left the inch deep IHC behind though - 1902, just like yours.....but greener. Sadly those eaten up Zincoln show up in the IHC or early wheat range.
Looking forward to hearing about your next trip out!
Brian