Hello, I have a Roamio Pro 3TB stock unit that is going on 5 years old. I would like to keep it going and running like new for more years to come. I'm very handy at building computers and such so I have no problem replacing and modifying these devices (I have modified my other TiVo's in the past). I take the cover off once a year and clean the inside, and fan, of dust. I'm wondering if it's time to do some maintenance like replace the fan and hard drive (I don't mind losing old recordings etc...) with new ones, or, just wait until something breaks! I don't mind spending money on it, I want to keep it running like new.