So TiVo scores a sale when I find out here how simple they made the upgrade process for the Roamio. In fact, as soon as another sale comes up, I'm getting another one.
I ran through a complete setup with the unit and used it for a few days. Part of that setup updated the TiVo software. What I did not realize is that apparently the updated software was placed in flash memory - not just on the factory HD. Today when I dropped in the 3TB drive it went through guided setup and was done.
I was expecting that with the new HD it would have to download (again) the "current" software.
This really is too good to be true.