I am buying my 10 year old son a Compadre for his birthday next month and had a question about the coils. Are these "concentric" coils? I thought I read that they are "widescan". Is "widescan" the same as the "double D" coils my minelab uses? Just wondering as I use a different pinpointing technique with my Sovereign and my son is used to that. He wants to know if he is going to have to learn a new pinpointing method with this new detector. Thanks everyone....