Go to a store that sells paint, grab a few paint sticks(normaly free) cut them into small sections and tape or glue things to the end. By things you will want to do Quarter,Dime,Nickle,Penny,pulltab,junkring,bottle cap etc.... Use these as air test strips. Place your machine over a table of sorts with coil hanging off the end and one by one wave the test strips under the coil. listen to what your machine is doing. Wave strips at diffrent angles and far and near to the coil. Try this with diffrent setting on your machine. Also what you can do to get use to things is do a test garden. If you have a yard pick a small area and bury diffrent things and diffrent depths. Space things apart to where when you swing your coil over what you burried your not going over the top of 2 things. Also mark what you have in the ground some how. And don't forget where you burried things lol. Also i'm not sure of your machine but if your hunting places you know doesn't have a ton of trash run it wide open no disc. and dig everything. you should run no disc. any way but i know i don't. Remember also if you do disc. that your gold falls in with foil and tab. Ooo and remember dig everything. HH