Review on Mount-It! Small TV Monitor Wall Mount Arm, VESA Wall Mount Bracket, Fits 19-27 Inch Display Screens, 75 100 VESA and RV Compatible, Tilts and Swivels, Holds up to 40 lbs by Jacob Fish

That's great, but: Be sure to tighten the square VESA center nut first. If you don't, your stuff will be flexible. I've installed 100 of these and they're by far the easiest and best value I've found. Quick Installation Notes: First, mark your top hole. It's a perfectly round hole. Push in to secure, or use a locking bolt on the bolt. Do not use the supplied magnetic spirit level on the extended arm. Once you've done that, mark the bottom hole. Now you can rock it up by tapping the bottom hole. If you use backlog, you can easily collect it. Just keep an eye on your level bubble as it might escape you on the last spin.