My apologies for late reply never even saw this, lol
I bought the Fisher f5, took it out on the beach people said it wouldnt work in the wet and it drills the wet propperly, Had it up against my friends at pro. Told him to go pro zero and whenever he gets a target let me scan and see if it will see what the At sees.... In the wet sand found targets 25cm + And it could see the signals some were very iffy but then i just crank the superman juice up ( gain) little tweak to threashold and voila can hear it loud and clear. I must however say if you push this machine to its max 100% power it does falsate its the same as the F70 and F75 can only run it about 60% power before it overloads its power....But as i said run normal settings get a target and push up the power slightly to get the target more clearer.
This machine really blew me away for the price you pay its really its moneys worth, The ground balance feature too is amazing. While you detect it constantly throws out a readout of what mineralization is doing on this spot and what the ground balance should be...with a slight movement of the thumb roll the know to get the ground balance readout the same as your settings and you set for propper scanning.
This machine is a real easy operator, I have another friend up in cape town using one and we frequently comparing finds, settings and how the machine is doing and can honestly say the only feature this machine is missing is waterproof - If it had this feature it would certainly blow sales right out the park.
I will be doing a full on review soon just getting my bearings right and putting in some hours on the machine so i can do a propper review and show you guys some depth and what a awesome machine this is.