Hi Bro,
Hope you got my email at your pm. The gpr is a big investment, Im very selective when it comes to clients and very particular with security. It is not a magic wand that many people think it is, it has its limitations and is best used with support of the other gear. The bottom line is trying to get all the information you can before developing a site and the gpr is just one instrument among many others. The best all around detector for our kind of hunting would be the 2box tf 900 or whites tm 808, the gemini by fisher is hard to ground balance. The two box is portable and gives you reasonable detection depth of about 4ft or deeper relative to target size and ground mineralization. I have recovered gallon size metal objects at 4ft, the advantage is it disregards surface trash your garrett would pick up, the minelab has a disc mode that eliminates iron but compromises depth but will pick up a sardine can at 2ft in all metal mode. I have been detecting as a hobbyist since 1997 and my first detector was a tesoro sidewinder, good for coins but limited compared to the minelab. many of my finds are commonwealth copper and silver coins and dropped jewelry. Still, i love the thrill of the hunt, the humidity of the jungle, the science of rehydrating and counting the calorie burn when looking for you know what. I find lots of unexploded ordnance (uxo) including a live 160lbs bomb, a 60 lbs, jap granades, and all sorts of ammo. You see the mountain in our city was where the japs made their last stand, its called mt patag, so you get to dig a lot of scrap from the last war. I believe no matter how sophisticated your gear is, if it is not meant for you by God, you wont find it. Amen? On the other hand, you wont know if God wants it for you if you dont look for it. if the rain stops, i have a site to visit this thurs, a pointer pointed at a place that turned out negative but while searching the general area i got a consistent signal from the 2box in an area not indicated by the pointer, sounds like a vertical metal pipe at 3 ft, this conclusion was reached after consulting other 2box experts in the internet. Will never know what it is until we start digging. Hope its a jar full of coins, ill keep you posted.
God bless
Jose