Hey need some help here. I am looking to purchase a new rack mount tuner and would like some feedback from anyone who has one. I am currently looking at the Korg DTR1 and DTR2 tuners. None in my area has these in stock so I am unable to try one out. By biggest concern is how well will they pick up an open B on my 5-string. My Boss TU-12H will only pick up a harmonic off the 12th fret and not very quickly. Any input will be greatly appreciated!