Out with a friend today[he uses a e-trac and I use a ATPRO with the 5by8 coil...he uses the larger coil on his e-trac].Well,after he found 2 mercs...one @ 6 inches,the other at 8......I said to myself..What am I doing wrong?To make myself feel better I air tested the 5by8 coil when I got home.Silver dime maxed out at 6 inches.....silver quarter @ 8 inches and a silver half @ 12 inches.Made me feel better,guess you have to be over it to find it!.....P.S....got my 1st Sacagawea 2000.....3 inches down....vdi'd...84!