Here's an interesting thought that popped into my head after reading the above quote in a different thread. I didn't want to hijack that thread, so I'm creating a new one. Has anyone tried using those 5 or 6 tuner codes on the base Roamio to see if by chance it's using the same tuner as the Plus/Pro models, and the only limiting factor is the SW/FW? I repair TVs on the side and notice on many an occasion that TV manufacturers use the same motherboards, power supplies, daughter boards, etc. to save manufacturing costs, and then just dumb it down in the SW/FW they flash to it ( as well as just leaving a daughter card or two out of the chassis).