I read FAQ. Very interesting. I want to understand what I have, before I consider adding anything else. Got D* last summer, Dish has 3 LNB I think (3 flashlights), and got 1 DVR and 1 D* tuner, and local stations. So installer ran 3 coax from dish, 2 to DVR, 1 to 2nd receiver. So if I want to swap 2nd receiver to Dual tuner DVR do I use a multiswitch and/or should I have another coax from the dish? I am confused because the FAQ says you need a dual LNB (4 coax) for a multiswitch to lock each on odd or even. So why do I have 3 LNB ? Is it for locals, and if so how does that figure in? Why only 3 coax? Bonus questions; My 1st DVR is Samsung 4080 w/Tivo, I don't want to deal with multiple interfaces, so I want the next to work the same. Will any D* Tivo DVR function the same or do I need the exact same model? Can I just get it on ebay? Thanks, this site is great.