I bought a Pochade box to use travelling and to do watercolours. Which you need to attach a flat surface to support the paper. It’s good in theory but the bottom bar has very little gap / claw like to grasp the board. I found a 3 mm plastic coated sheet to fit. The top arm seems to have a wider grip. If you want to work small then this works fine. I will be using A3 size . A cross bar magnetitzed would help to stabilise the support. Otherwise it is a beautiful functional box. The pallet slides out with a magnetic side bar and the lid collapses down with another magnet which keeps it snugly closed.