So I got an R16-300 yesturday. It setup easily at first, but my HR20-700 lost all of the signal it had. When I rebooted it stuck at 0% again at aquiring guide inofrmation for a couple of minutes. So I unplugged the H21 and it began to load. So when it finished all the channel mappings were wrong. I did an RBR and it loaded correctly. I checked it this morning and all is working well. Now the setup is. SWMLine > Skywalker 4-way splitter > leg 1 to HR21-700 > leg 2 to R16-300 > leg three to PI > HR20-700 > leg 4 to H21. The H21 hasn't been rebooted yet. By my count thats only 7 tuners on the SWMLine. This should work perfectly,but the HR20 was still down last night. Just a thought but maybe when adding a reciever to this system the PI should be reset. I didn't do that. I will continue to watch it over the next couple of days.