Your tools are so awesome! For some reason though the viewer doesn't accept any of my keyboard input anymore. Only mouse clicks and movement have an effect. As far as I remember it has worked before.
Ooops ... I guess it's fine. I forgot that I had to disable auto rotation ~ first to make the navigation work. I was confused by the double assignment of "W" for toggle and navigation, but after ~ I was able to navigate as expected. Sorry for the confusion.
And thank you for sharing your creative and unique experiments with us!