I tried making a wall climber by using a Klann linkage but found out that the leg would be engaged for more than half of the climb cycle so I couldn't have one leg engaged and another released at the same time. It was then that I had a greater appreciation of your mechanism. Shortly after I came up with a simpler solution which I posted as a response to this scene. I hope you are not insulted by my scene. It's just me trying to find the simplest solution to the problem.
