Well i just got home from test driving my new nel tornado 12x13 on my silver umax and i realized i need a shovel hahahahaha. The tornado has excellent build quality and comes with a coil cover and very thick cable that suppresses emi. the nel is stable enough that i can run the sensitivity wide open with no chattering , i can also do that with the stock coil. I believe that is because of the mild mineralization of missouri soil. I started off searching a small park with a baseball field and sand volleyball court , i naturally hit the sand first so i could dig everything with ease. First find was a bottlecap at 8 inches , the stock coil will also do that , but several minutes later i started hitting bottlecaps at 12 to 14 inches. I cleaned the sand lot of bottlecaps and small pieces of wire and assorted trash that somehow finds it's way into sand hahahaha. Now it's time for dirt , i headed over to the shelter and then i realized i need a shovel because my lesche digger is good but the nel can find a bottlecap at 14 inches in dirt also. It sounded like i went over a buick hubcap , or the whole car. Then i came home for lunch and to write this up. I'm very impressed with the nel and it's performance. The weight is not far off from the stock coil and it balances out well. My arms are tired from digging , not the larger coil.