Agreed- dock is the way to go. I’ve had 20-100’s and -700’s. The -100’s were twitchy and it’s the only model of the HR2x series where I lost a motherboard and hence 3 hard drives of recordings. My -700 is still rocking and still fairly easy to change the drive. 3 days ago I did have to change another fan (another non-square one) in one of my HR24-100’s that locked up after 11 years, but that’s why I have spares. I keep a lot of fans in stock for my setup of so many DVR’s!