Well, my celebration was a little premature. ........ Today I picked up the m-card and TWC could not get it to pair in the Tivo. After going through a lot of troubleshooting and another m-card, the consensus is that the Tivo box has a tuner issue and I'll need to send it back to Tivo. Which means that the original 1TB drive is going back in the unit before I return it. I think the lesson I learned here to pass along to others is to verify the equipment before making the mod. Question for the geniuses here: Should I restripe the 4TB drive or do you think it is OK (as is) to use in the next box?