I have about 6 hours on my new 900. I went to three different spots that have been pounded by myself and others. I have a 43 Merc,a beat up Rosey and maybe 3 wheats and a memorial cent. I dropped the iron bias and recovery speed to get more depth. I have been running Park 1 and Field 2. Sensitivity from 21-26 depending EMI conditions. Yesterday I had a hard time pairing the headphones. Did I get a lemon or are there no coins where I hunted? Thoughts and suggestions greatly appreciated! Thanks! Ted