Advertisements Hello. I just purchased a TiVo HD with lifetime subscription for a very good price from a private party. Its a model number TCD652160 which I assume has only a 160GB HDD as it shows 21 HD hours in the System Info screen. I currently have a TiVo HD XL, model number TCD658000, with a factory 1 TB HDD (157 HD hours) and a monthly subscription rate. What I would like to do is to swap the HDDs between the boxes as well as move my existing Mcard cablecard and Tuning adapter to the new TiVo HD without having to get the cable company (Charter) involved with a truck roll. I would then have a TiVo HD XL with a smaller (160GB) HDD and a monthly sub that I would de-activate and probably sell. Is my plan possible? I know that the lifetime sub is tied to the box's motherboard and the cablecard and tuning adapter is tied to the HDD. Thanks for your help/suggestions.