I have just invested in the Roland A500 controller and my Roland G1000 and Roland FP80 are currently standalone. I want to link them using midi. I have a Midiface 4X4 unit and the Focusrite 6i6M usb/midi interface. How do I connect them? A clear cable routing diagram would be really appreciated. I have a dedicated Win 10 PC om which I have much music software and I am running Reaper as the DAW. Any offers of advice/assistance would be much appreciated.