Thanks for reading. I have a pretty basic mount question; this is discussed all over the place on the internet but its hard to get a crystal clear answer and I want to make sure I get this absolutely right. I am having my home observatory pier installed in the next couple of weeks and I will be putting an iOptron CEM 120 on it. Very simply, do I need to have the pier and plate set up so that the mount is facing true north? If so, what is the most accurate way to do this. I apologise for what I know must seem like an obviously basic question but sometimes things are so basic, they aren't explicitly stated in other threads or elsewhere on the net.