I have two Lexicon MPX R1s, I plan to purchase a Mastermind GT. Can they work together to control two MPX G2s, how would that hook up? The R1s are phantom powered with 7 pin cables from the G2s that also provide two way communication, CC pedal control. The R1s can be powered directly with their wall warts, the G2s have a Controller/in and midi thru and midi out. The R1s have Out/remote, midi in and midi thru.