I wanted to get a higher horizon on the view out back, so I constructed an extension to hold my pochade box at the top of a stepladder. Judy took a nice video (with Foo Fighters soundtrack) of me trying it out for the first time - it went pretty well, even on a brisk, windy day. The other pictures show the elevated workspace, and a side view of the extension showing the 1/4" 20 bolt that fits the tripod fitting on the box and the stabilizer bar at the far end. The near end has a hook that secures it to the top step. It's enough to support the weight of the box, but in practice I added a couple of clamps to relieve the strain.