I have upgraded my Directv Tivo units in the past. I have one of the new HD DVR's on its way. Will have it next week. I want to upgrade it to a 2 drive system. I will buy 2 new HD's and keep the originial drive as a backup. Question. Do I need some sort of bracket or anything for the internals to hold the 2nd drive and any new cables needed? If so where can I buy the pieces I need? Trying to go cheapest solution. I saw on weakness they had it with a screwdriver kit but don't need that... Thanks..