I was wondering what is commonly considered by the experts ( by that I mean all of YOU) to be the optimum 12" coil to use on this machine. I have read/ been told that a 12" coil may be the way to go in certain situations on the beach ( I live on the coast) and also in some larger areas like sports fields, school yards etc. I am pretty new to this craft and there are so many options and claims out there that it's hard to make an informed decision. I want to keep my eyes open for a good deal and would like to know which coil to look for specifically. Any suggestions or advice would be greatly appreciated. Thanks- Scott