houdy i would like to direct this question to longhair if he is listining, i have been using the 705 for quite a while and it is a bottle cap magnet. i have not dug a single silver coin to date. i will admit i have dug silver jewerly and a gold ring , but what the heck do i need to change on my settings. i have hunted propertys dated back to 1894,several times, gridded every direction you could imagine and no luck.i have been to camp sites , the beach , old propertys . i have 4 differennt coils, i prefer the 15 " wot coil and yes it is is a coiltec. i have the digger coil and two minelab coils/ . i hunt in oregon and the ground is highly minerlized . i can run a magnet across the ground and it will be covered with particals of iron/ . i have read every thing out there. it is a clad magnet but what the hell. i have dug a thousands of hours worth of thrash . i only hunt old stuff , i dont like metal detecting in the public view. i have hunted campsite over 100 years old. the places i hunt is absalultly stuff that nobody else hunts. i go in the water with this md there has to be something i am missing. please help, but so you know i am going out the next chance i get. the next one is going to good . i dont have a 18.75 coil my wot is a 7.5 and the other ones are 3.s and 7.5s. do i need a 18.75 for the gold. my phone is 541=9-69=7712 . would like to talk to about the kind of mding i am doing