Thank you very much for the help.
The thread is huge, with a lot of issues discussed.
Overall it looks to me like there were a few bugs that need to be fixed, but once this is overcome, it is an accurate focus motor which is good value, and can be used with third party software through ASCOM. Temperature compensation might be a good enhancement by CELESTRON next production.
Does anyone know if the screw length issue, which requires a washer, has been fixed by CELESTRON in their current production ?
Another question is whether the focus motor interferes with a filter wheel / camera, because it seems to take up quite a bit of space.
once again, my appreciation for your support.