Dan I do not agree with your statement. I have implemented it in libnexstar.
So libnexstar supports PEC training and playback for Celestron mounts also download and upload of PEC data. Unfortunately I sold all my Celestron equipment including the mount so I can not implement it in indi. But it would be easy to implement if one uses libnexstar.
Yes, we do agree on this. Its already implemented on the hand controller, so, I was asking if Scott knew that it was not already implemented on his software. I would suspect PEC values may be stored on the motor control board of the mount. If so, once recorded it would be permanent unless redone.
Yes, indeed, from what little I can glean on the internet, one can use the hand controller to record a single 8 minute set of guiding and use it as a correction. But all of the best PEC software will usually record many such tracks and average them, then upload that as the correction. I am asking if anyone has built a routine to do this under INDI.