Want to swap the Bart for either a EMG BQC system or BQS system - preferably BQS. NTMB is vol/stacked bass/treble, mid w/3-position mid switch. I can alter the configuration with no problem as needed for swap. Depending on price for sell will go with either stacked bass/treble or seperate bass treble. Or you could just have the preamp and mid unit with no pots/swtiches - whatever works. Can sell but I'm luknfur a swap. But have two of them and the OBP-3 has replaced the one Bart so have no use for two now. Email cause I forget to look at the PMs and include NTMB in the email subject or I'll just delete it not recognizing the source.