If I buy a used TCD649080 that's got service for another month, and I get the MAK from the sellers, I assume I can re-run guided setup and just make it look to TiVo like I moved from one state to another. Then, when the sub runs out, the old owners can take the machine off of their account and I can add it to mine and start up a new sub for it. But, in the meantime, if I setup TiVo Desktop on a different computer on my network from the one currently running it for my other 2 DTs, and tell that version of Desktop the old owners' MAK, and transfer to computer stuff I record while the rest of the old sub is in force, once I activate the new machine as mine, and it gets the same MAK as the rest of my machines, is there any way (moving shows from one computer to another, reinstalling Desktop, etc) to copy the shows recorded under the old sub back to the machine that recorded them in the first place. Does Desktop strip out the TSN id on each recording and replace it with the MAK? Or, if I get the machine, re-run guided setup so that it can deal with my cable provider, and let the old owners' sub run out before activating it under my account, at which point the MAK would change from the old one to the one on my account, can I copy off shows I recorded on the old sub to computer using the new (to that machine) MAK, and view them on whatever TiVos on my account haven't broken down at that point? Thoughts, theories, lessons painfully learned?