Every so often I need to plane down a piece of wood that is too small for my jointer. To handle these small jobs, I devised a stand for my No. 5 Stanley jack plane. The plane rests upside down on two wood blocks that fit up between the ridges on the sides of the plane. This keeps the plane centered and also prevents sideways movement. The front knob pushes against the front wooden block and keeps the plane from moving backwards. With the use of a small push block, I can safely and accurately plane even tiny pieces of wood.
I use this inverted plane method a lot. I like the idea of the small push block, but the stand seems superfluous to me, not to mention the fact that it puts your work at an uncomfortable height. It's easier just to clamp your plane in your face vise. The height is right, it's held securely, and there's no extra contraption to build or for which to try to find storage space.