I went back through the fourm letters and found one that said to tape my coil cord so that it ran stright up th shaft of my Ace 250.Well I just want to say thanks I now have two new MDs it is great.I have found so many more things such as gold rings and clad .I also tried this with my bounty hunter that I bought from Walmart and now if I am within three feet of car or a house with aluminum siding it goes off it just blows my mind. With this MD I have rehunted my old spots and found things that I SHOULD HAVE FOUND BEFORE! But NOW I have a question what about a smaller coil do they work or would it be a waste of time? Because now I seem to be digging a lot of trash and I was wondering if a small coil would help? THANKS AGAIN