I'm wondering if I can use the second multi pin amp switching jack and a BOB-8 box to switch channels on two different amps? I'll have a cable made for my Bogner XTC that will only use switches 1-4 to access Channels Green, Blue, Red and the Loop. Then I can use pins 5-8 thru the BOB to switch two other amps and my Headswitcher. Does the BOB isolate the grounds?