I have a xcal 800 I bought new years ago. Since then I purchased a equinox 800 so Im detecting again. The excal is in rough shape meaning the cables for the blue headphones and the cable to the coil have lost most of the outer insulation off. I am considering refurbishing the excal. I have read many things about coils so I am more confused now than ever. I use it mostly for saltwater beach and general land detecting for coins and jewelry. I don't dive with it but do stand in water a couple feet deep. I will send it to the repair shop at minelab in PA but want a idea what coil I should ask for and is there a better option out for the blue headphones? Is it worth $450 to refurbish since I already own a equinox?