I currently have 3 receivers in the house and I want to upgrade one of them to a BEV 6100 unit. I recently moved so I have the compatible dish with both LNBs (only one is active). I only have 2 lines into the house from the 1 active LNB and don't really want to add 2 more lines. Can I use a SW21 splitter to run off the active LNB and then use another SW21 splitter for the HDTV satellite. Would like to know what I need to buy before I go to the store! Last resort is 4 lines into the house with a SW44 switch.