I have my Sand Shark since August 10th. It is a great machine, Be prepared, however, (as others have indicated) to dig a million bottlecaps, pull tabs, foil seals from bottles, etc. I have found that the Sand Sharks tone in the sand for a bottlecap, a pull tab and more is the same as that for a nickel and a quarter (a dime sounds less intense, usually, depending on depth).
Terry: I watched you vid and it is very helpful. My problem is this: after I hunted the first time I tried to follow your advice and take the machine apart to rinse and clean. The plastic lower shaft was tight in the middle metal shaft that it took me an hour to get it apart (very carefully I might add). I called Tesoro and spoke to an "Engineer" who suggested that I sand down the plastic lower shaft so that it would fit better. After I hung up I said to myself: "I just paid $600.00 for this machine and I have to sand down the shaft so it fits better?" Anyway, I am more than disheartened with Tesoro's customer service and I don't have to explain why. Now, after 12 uses on the beach, I absolutely cannot get the lower shaft free. Right now I have "Liquid Wrench" soaking the middle and lower shaft in the hope that it will come free.
So, other than that I love the machine, although I wish it would give me different sounds for trash.
If anyone can tell me how to free that shaft, I'd be very grateful.
Sorry for the long-winded post.