hello,i'am going to Arizona in January and going to take my mxt-pro with me to hunt for gold.i need advise on what coils to take?i have the 10x12 sef,6x8sef dd coils was thinking about taking the 6x8 but am wondering if i should get the little 4x6 shooter instead? i'am a experienced detectorist having coin shooted and relic hunted since 1993, but this looking for gold is going to be a whole new ball game for me.thanks.