I have a Denon X4000 AVR and an Marantz SR7007 driving two systems in adjacent rooms. There are several sources that I'd like to share from the Denon to the Marantz. After trying a few of the cheaper HDMI matrices with little success, I was advised on here either to get an expensive matrix, or just use the zone 2 HDMI output of the Denon into the Marantz. I chose the latter, and it works reasonably well, but I have two issues: 1. My Apple TV is connected to the Denon and gives a full size picture on that system. On the Marantz, the picture and sound come through fine, but the picture will not fill the whole screen. 2. After a short time, I seem to get HDMI handshake issues on the Marantz system, resulting in the picture and sound turning off altogether. Are there any suggestions to remedy these problems?