I recently switched out my HR10s with two HR20s. I also have another DirecTivo and another basic DTV box. So in all I have 4 TVs in my home. I no longer use OTA. If I understand correctly, SWM allows you to run one wire per box instead of multiple wires and also allows you to use diplexers if you are using OTA, just like I used to on my HR10. If the installation is already completed, and all is working fine, and I have no desire to use OTA, is there any advantage to using SWM?