Is it possible to use three Yamaha SB168-ES interfaces with an M7CL-48ES and a PM5D-RH? I want to use the M7CL-ES as a monitor console with the SB168-ESs providing the A/D and then send the input channels to the PM5D at FOH via ethernet. This is to get around having to use an analog split for FOH and monitors. In this set up, do does each console have gain control over it's own input channels? How many of the MY16-ES64 card do I need in the PM5D to get all 48 channels?