Has the DirecTv dish/LNB cable technology advanced any over the past 5 years or so? Specifically, I have 2 RG-6 coax lines coming down from the 2 LNB dish on my roof down into the 2 tuners in my HDVR2. Now I want add a HR10-250 and keep the HDVR2 active as well. So I will have 4 tuners that need to talk to 3 LNBs. 1) Can I do this using only the 2 existing RG-6 coax lines? 2) For that matter, have they figured out a single cable solution to all this yet? ie. not necessarily coax but some other cable type? 3) What is LNB stacking exactly?