I’m also really interested in some sort of public calibration. @CarlThomme, if its a public project, I’m interested in following it, or maybe we can cooperate. I have noticed though that if you write the app from scratch thinking that it should work without calibration it makes a big difference. You can often achieve the same thing in many different ways, as an example, using “layers” with zooming. My experience is if I use 9 zones on a 24″, its not a big problem, and often I can rewrite the application to work in another way.