[Dennis G]

This informative artical will never date and remains a valued tool for those setting up the polar mount. I hope you are still available Geoff to answer this question. The scope in question is a LX90.
You make no mention of set up. I was of the opinion for accurate interpretation of the East or West Star's drift, the Dec pivot of the optic tube must be vertical and remain so while observing the star's drift and the scope must be tracking - driven. For the meridian drift the Dec pivot must be horizontal and the scope travcking while the observation is made. Your comments Geoff would be appreciated.