I recently bought a peterson Strobe stomp. It is supposed to be the best tuner available right now but im somewhat confused... How do u use a strobe tuner? It has 3 lines of square blocked that either go up or down and when u get close to your tuned state they slow down and stop or whatever.. But sometimes there is a fourth line that comes up... This is not all the time just sometimes? Any tips on using a strobe tuner with such sensitivity? Its a pain in the ass how picky this thing is. Thanks.