In reply to:

Unfortunately, my aforementioned Sony universal remote would not allow the programming of the button that allows you to choose whether you're controlling the Master or Slave. In other words, my gut feeling is that the MX-700, if fully programmable, would allow that function to be assigned.


Does that code actually exist? The question would be if there are actually codes to control the slave device seperately from the master.

If there is a code, chances are the MX-700 can handle it, if there is not a code...no remote will handle it.