Have a Tesoro Sidewinder with the 1/8 inch headphone jack .I would like to get this replaced with a 1/4 inch jack and also if possible to add a ground balance to the detector preferably a ten turn pot if interested send me info on cost to me . As of right now it will not detect more than 4 inches with the 8 inch coil so not sure what gives but I do know Tesoro will not do the mods I want .