I designed this airplane balancer after becoming frustrated with the commercially available one I had. BikeJunky's balancer had some neat features that served as a good starting point, but I wanted a moving pad to set the wing on. The base and ruler are also a bit larger.

I kept with as many of the same dimensions as I could, so parts from this should be interchangeable with BikeJunky's balancer. Use his ruler and base if you need shorter ones to fit a smaller bed.