So the time has finally come...I am gutting my Lakland 55-01 and throwing in a fresh set of MK5CBC's Now..I am a little bit confuzzled with selecting the pre amp..I know that I want a Bart NTMB but I am not sure which configuration I will need Here's where I'm looking - http://www.bestbassgear.com/bartolini-preamps-ntmb.htm# Which one do I need to get??? My 55-01 has a volume (push/pull active/passive), treble, mid, bass and blend. The closest match I see is the 5.2 A/P - 2 Pickup - 5 knob configuration which has... - Volume (with Active/Passive push-pull) - Blend - Treble - Mid (push/pull freq selector) - Bass My bass has all of the above except no push/pull Mid freq selector. Will this matter??