I decided since my 6 tuner Roamio was only using 4 tuners and the 4 was not reliable, I would replace the cable card. I have replaced the cable card. I was excited when the cable card started to update. No luck, it did not update to 1.5.3. All 6 tuners appear to be working ok. I figure I'll just keep all 6 tuners on even if some of them fail at times. Why limit to 4 tuners if they are not reliable. I might have better odds with 6 maybes than 4 maybes. At least when Xfinity On Demand started I could watch the missed shows, but Xfinity On Demand has not worked for the last few days. There is a separate thread on that. Maybe this cable card will work perfect.