I have several of these from different manufacturers. It had the potential to become my favorite, but it has two downsides. First, the rubber feet don't protrude far enough to stick to the surface they're sitting on. Second, if you mount it horizontally, the pivot adjustment screw is too low, causing it to wobble back and forth because it can't sit flat. Otherwise, attach it to a tripod or slider and you're good to go! Updated 2021-0628. I've just noticed that it sits flat and doesn't slip when