I have a QHY PoleMaster on my Vixen Sphinx mount. I had difficulties with the PoleMaster application but resolved them by using the SharpCap application. Subsequently, I discovered that just positioning my scope to polar declination and right ascension (as if aiming at the pole), using a ZWO ASI120MC-S with a 12mm lens, and running SharpCap's polar alignment was more than adequate. I'll keep the PoleMaster mostly because I can no longer find the original, Vixen cap, but I obviously don't need it.
