There are a lot of monitor arms out there, but many don't come close to being 100% reliable for a Thunderbolt monitor's 24 lbs. I've read reviews on amazon and looked at specs, and most say either they barely can hold it, or that they can hold it up but the monitor mounting point droops down. Is there a bullet proof desk monitor arm that can hold the 24 pounds on both the arm, and the mounting pivot (where the VESA mount connects) without a doubt? I can't find a lot of desk mount arms with clamps that are guaranteed to support it's unusual weight. Anyone have experience with an arm that is rated for well past 24 lbs???