I have a real simple setup right now. Both sites can RX and TX. Of course in voting, ACID is going to use the best RX signal and send that back out to the RTCMs for the TX audio that feeds the repeaters. I am still working on a master clock solution for the transmitters. As of right now at the location I am testing, I am not hearing any heterodyne in the TX audio. Of course this can and will change depending on my location in reference to the sites.
Site 1 - master
Node running ACID
Kenwood TKR-820 repeater
RTCM
Garmin 18x LVC
Site 2
Kenwood TKR-820 repeater
RTCM
Garmin 18x LVC