When super tuning a Garrett Pro Pointer to achieve greater depth, must one use the exact coin that is the suspected target? That is to say if you have tentatively ID'ed the target as a dime, must a dime be used in the super tuning procedure, or can you use a nickle for example? To those who have no idea what I'm talking about follow the link below. Thanks.
http://www.youtube.com/watch?v=FUlewb1xGN8
http://www.youtube.com/watch?v=FUlewb1xGN8