Yes I could try playing around with cables but, as this is not my main TV set up, I think I will wait as I have a new Radiance on the way. I intend to put the new Radiance in my HT room and then move one of my older Radiances into this setup. Given the two HDMI outs on the Radiance, I will be able to put the Radiance before the HD621. Thus I do not have to run an HDMI cable out of the HD621. I am guessing that will work.

MD600(2x2TB); iPad Pro
LR. 818v3, 8000SE
HT. 861v8+ID41,HD621; BW 2x802D,HTM1D,4x804S;SVS sub; Mac 5 MC501s; RGP 600Pro, JVC X950; Radiance Pro; Oppo 203
FR. G65, DSP3200-3300 DSW, HD621; Mac MC152; Oppo 103, PDP TCP65VT60, Radiance 2124; RGP1200C
4. G65, DSP3200-3300,HD621; OPPO 83, Radiance XE PDP
5. 818v3; Prime HP Amp; HD800