Thank you for posting that video, believe it or not it was a big help. I've looked through the HP.IO groups and downloaded the Python script that has been posted for the calibration procedure but unfortunately, I have never used Python before. I installed Python but not really sure what to do next - I've got to get up to speed on how to make all that work first. Plus it looks like there are multiple .py files and there isnt a procedure written on how to use them. I dont know what needs to be done first, second, etc. Got a lot to learn.