Greetings all, I have a Smith Burner CR4 bass, and the original pre is out of commission. I have been given a Bart NTMB 918F pre assembly and a pair of Bart J (long) p'ups. I'd like to try and leave the original Smith J-p'ups in the bass and get the new pre in there. The Smith has 4 knobs, and I'll try and keep from drilling any new holes in the bass. I figure I'll need a stack Bass/treble, a Mid switch/knob, Vol and P'up Blend. So if you have some expertise with Bart pre units I'd be interested to know if I can jig the NTMB to the existing Smith J p'ups. If not I can just stick the Barts in there. Thanks for any advice, help here.