I've been experimenting with auto +3 and manual sensitivity. Something I've noticed is if I run it in higher manual sensitivity it nulls nearly all the time while in auto it doesn't. If I have the sens high and it is nulling like that will I miss coin signals? Or should I lower the manual sens down until I don't get constant nulling? By adjusting my FE #'s from 27 to 24 I'm able to run a higher sens without all the falsing. Is this a good idea or will I miss deep coins?