I'm thinking of buying the Lacie 5Big or 2Big Thunderbolt. I have several questions. 1. Can you actually swap the hard drives without fastening them with screws to the trays? I know you are supposed to but would it be possible for faster operation to the whole thing without using any of the screws? I have tons of hard drives which I want to swap quite frequently so I don't want to waste 2 minutes for every swap. 2. How big is the noise of the device? Is it annoying enough?