I have the BK7M and for live use you definatly need the FC7 pedal board or PK bass pedals which can be used as a controller. That will solve the live control issues very well.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer