I finally got out with my backup  Woody modified SD2100 the other day and that machine is becoming my go to detector.  I found six nuggets, one a 8 dwt specimen with about 4dwt of gold in it and five others for a total of 11 dwt.  This detector is so nice to use, its quiet, easy to keep ground balanced and tuning it is almost a none issue where I use to pull my hair out trying to keep my older 2100 tuned.  It is so much nicer to use that my old sd2100 that I had years and years ago.   Woody you might be seeing my 4000 this year for some mods as soon as funds come available.
Thanks again, Wes.