For other PMX users. I have started up a thread on the SB forum. It does not involve SGP as far as we can tell or non-Paramount mounts. Ken and Jared, thanks for taking a look at this.
At the end of the day, two users have had the same problem, somewhere between TSX and PHD2 when using the same hardware, directguide and ‘slew stops guiding’ option enabled in PHD2.
I also have to make a point. My electronic and software designs are used by hundreds of thousands of customers. I don’t expect users to understand their detailed workings or castigate them for an incorrect diagnosis.
Many SGP users, myself included, don’t know how ASCOM works in detail and can only report what we see. This is after all a hobby and a complex one at that. One allure of Astrophotography is the collaboration between users and developers. Unfortunately ASCOM and its drivers, as the bit in the middle, are always going to be a scapegoat in the minds of many. It is the nature of the beast and remains the challenge for it and its developers.