^^^
you have an "interesting" idea of fun...


for those interested in zone 4... here's data point for signal strength... finally got everything semi glued together for that... i'm running it with a 40 foot blue jeans series 1 cable, standard speed... no problems passing 1080p60... that's a good sign...

other stuff:
edid info seems to pass unmolested... i tested this with multiple sources and sinks...
it handshakes gracefully when the reported display resolution changes, as well as on source changes...
use zone 4 discrete codes for power on and off... especially "off"... also, you may need to increase the power on delay for zone 4... when the main zone is off, a zone 4 "on" command takes a bit longer than expected... i had to increase the delay to 2 seconds before a subsequent zone 4 command would reliably work...
i hope to get zone 2 implemented by the weekend... we will see... i don't expect any issues there...