We have a Series 3 downstairs connected to our main TV, it has an S-Cablecard and an M-Cablecard. Originally it had two S-cards but one of them failed and Charter replaced it with an M-card. We pay $2 a month per card. Upstairs we have a TivoHD connected to basic cable and an indoor antenna for some HD channels. It has no Cablecards, so the channels are limited. I started thinking that I should move the TivoHD downstairs and see if I can plug in the M-card and get it to work without a Charter service call. I heard others on this forum had luck doing this. Then turn in the S-card to Charter and hook the Series 3 upstairs. If it works then I would save $2 a month or $24 a year, I know it's not a lot but it adds to the household budget and in this economy every little bit helps. The only downside is that I upgraded the Series 3 with a 1TB drive and I would probably have to do that to the Tivo HD since downstairs is our main viewing area and where we record more shows in HD from cable. So what do you think? I won't do this if I can't get the Cablecard to work without a Charter truck roll. And I prefer looking at my Series 3 downstairs over the TivoHD because it has a clock, but it all boils down to saving some money right now.