Question guys, I purchase the HiRise by Twelve South a while back but have never used in fear that I realized it has magnets on the front end of it to hold the tray front on without screws. Is this not harmful to the Thunderbolt? Or my Macbook Pro which would be on desk nearby? I've always read horror stories of magnets "Scrambling" computers HD's etc. Any help would be greatly appreciated! Thanks in advance!