For several years I have had 2 HR-20s and 1 HR 21. Several years before DTV came out with MRV, I had a home grown MRV system where two receivers were in the LR location feeding an AVR by HDMI and a component video / digital audio switch by component. This switch fed the other two locations (MBR and "Boy Cave" room above the garage for my two sons). The third DVR was dedicated to the "Boy Cave". Because I was happy with my set up, I am not really up on the latest DTV technology. A few days ago I noticed I was not getting certain channels on all three receivers. It turns out my LNB was damaged and I was not getting any channels on 103. I called DTV and they offered a service call for $49 or a Genie upgrade for $99 plus and extra $3/mo for MRV. I went with the upgrade. (After reading through the forum now I realize I might have been able to haggle for a lower cost, but that is water under the bridge). I swapped the Genie for the HR21 only because that machine had the fewest recordings on it. The installer changed out the LNB, added a SWIM 16, added an 8 port splitter, added some sort of power injector, and added a splitter to each HR20 that feeds the satellite in and breaks out coax and ethernet to the HR20. One line from the SWIM goes directly to the genie, another goes to the splitter which feed the HR20s. He told me the line to the genie can handle 8 tuners (only have 5) and the line to the 8 port splitter can handle 8 tuners (only using 4). He said he could have use a four port splitter, but he didn't want to tone out all the lines so he just hooked them all up. I have a few questions about this set up: 1. When he left, all the MRV was working but none of the receivers could see the internet and I could not see the receivers from my DTV iPad app. I connected an ethernet cable to the genie and now all three receivers are connected to the internet. Was this just an oversight on the technician's part? Is this the DTV supported method of connection or the unsupported method of connection that I am reading about? 2. The CSR had tried to get me to convert both HR 20's to clients. I did not want to because I wanted the extra tuners on the HRs and did not want to loose all the recordings I had on them. Is there any advantage to switching the HRs to clients? 3. I am thinking that operationally I may want to take the "Boy Cave" HR out of the MRV. Pretty much they have their shows and we have our shows and I don't want them to inadvertently delete any of my shows. I could not find a way to do this in the menu system. Is there a way? Alternatively, could I just remove the coax / ethernet splitter from their receiver? 4. The only advantage I see from the MRV system versus my "home grown" version is that each receiver shows a unified play list. Are there any other advantages I am missing? Thanks in advance for your help.