Just bought my first detector....fisher f2...didnt want to spend a whole lot of money not knowing anything about this hobby...read alot of reviews...hard to choose between the f2 and garret 250...went with f2....anyway, can someone clarify what the numbers mean when I use the pinpoint button..00,01,02,03, etc...also what does the number value mean relating to the tone..thanks and expect alot more questions because I have fell in love with this hobby...Russell