Up until the purchase of my new display (Sony 75Z9F), I had been using the RVU app to view the occasional 4K broadcast. Unfortunately, Sony has dropped RVU support from their 2018 models. To restore my capability to view 4K programming, I will be requesting a C61K from DTV. I plan on having both an HR54-700 and the C61K in the same equipment cabinet, with both connected to the Sony TV through a Marantz AVR using HDMI. Can someone take a look at the attached diagram of my setup and tell me what I need to hook up the C61K? I think it is as simple as adding a 2-way coax splitter to provide a coax connection to the C61K. Thanks in advance!