I have companion sitting on the Master in my 800 setup. Not an issue whatsoever. In this way it hides the cable better. I just 4x silicone Cones to support the Companion, raising it up by 1-2 inches, that's all.
Deviate 800 / PMC Fact 12 / Clearaudio Concept MM / Aurender N100H / MacMini Roon