Actually that's a good point, my sky tv box lets me record 6 streams plus watch a channel at once, however i rarely have more then 1 or 2 recordings at a time,

Actually that's a good point, my sky tv box lets me record 6 streams plus watch a channel at once, however i rarely have more then 1 or 2 recordings at a time, so on average i have +2-2 channels available to holder in buffer.