Well, I tried and failed to get MRV working with the disconnected HR44. Turns out I was at least partly right about Whole-home not being authorized on a disconnected receiver. (This was on an H25.) Rebooted the 25 to sat authorize connected, then tried to connect to the 44, but 25 wouldn't "see" anything. I thought I'd read that MRV works directly through the splitter and doesn't need a SWiM switch, so I used no SWiM, but maybe that was the problem. I've got a few other ways (and other units) to try it with, but probably won't be for a while. Not giving up yet.