How would i go about spot leveling a guitar where 2 high frets are next to each other? If i use a fret rocker on 11-12-13 it rocks but it also rocks 12-13-14. Im getting some buzz when fretting the 11th fret but lots of buzz when fretting 9 and 10. Making me think the 11th fret is the worst offender. Would i level the 11th fret first then reassess if it rocks on 12-13-14?