Talking to sat installer about my plans to fit a twin output monoblock running to two receivers in different rooms (because the dragon refuses to share with any other cam) he told me because you set the diseq on the receiver I would need two single lnbs on an adjustable arm similar to echelons, but then I'd only be able to view one sat (say astra) in one room and the other (hotbird) in the second room. I am confused, do I need a single mb, twin mb or two seperate lnbs??