I just received my new 11 coil for the Deus today. Ran it through the test garden and some air testing. I think I'm going to like this coil it is about 2 -3 inches deeper than the stock 9 and very stable. I know some of you are waiting for a report on the Deus and I plan on making one just need to find the time to do it right. I have about 50 hours on the Deus now and can say that it is a quality detector and a dream to swing because of its weight. I do feel the 9 coil is not deep enough for my type of hunting but this new 11 seems to be the ticket.