Have a Dish 500 with dual legacy LNB's pointed at 110 & 119. I want to add 61.5 and have another Dish 500 with dual legacy LNB's. I have pointed one of the LNB's to 61.5 and read somewhere years ago how to combine 3 legacy's to one output for my 211K. I know it's easy if I switch to DP LNB's, but am happy with what I have. I have numerous SW21 switches if I can use 2 or 3 of those..