Hey...ok, now I want to setup 2 marshall heads into one marshall jcm900 4x12 cab, in a safe manner that won't damage anything (haha, I'm known for damaging stuff!). I want to be able to footswitch between them too, kind of like using each amp as a seperate channel. This must be possiable, how would I go about doing this? Hopefully a rather inexspensive way...hope you guys can help me out, thanks in advance! -Matt