I haven't kept up with the SWM threads so I don't know what all is involved there but I was surprised to see tonight while I was switching out my coax inputs into the 20 to check on a problem I was having that I was able to have both tuners working with one input into sat 2 according to the signal meter. Just to make sure, I recorded two things at once and it worked. I thought for the single input to work you needed some special equipment. I just had a single coax running into the back of my machine. What's up with that?