[astro_nutt]

Hi Harry.
I'll try to explain as best I could. (I made my setting circle so that it moves around on a track attached to the scopes base.) Looking from above the setting circle should increase in numerical value to the left of 0. The scope is pointing North and you are observing through the focuser at 90 degrees from the front of the scope. If the setting circle was aligned at Magnetic North, the numerical value of the setting circle would be 270, and at the focuser side, being 90 degrees less should be 180. However, for the setting circle to be aligned to True North, you have to allow for the geomagnetic offset. In Melbourne the offset is 11.5 degrees West of North. So, when I set up the setting circle and after I align the front of the scope to Magnetic North and the numerical value of the setting circle indicates 270 degrees, I then move the setting circle to allow for the offset so the front of the scope indicates 281.5 degrees and is set for True North. Looking down standing in front of the focuser, it should indicate 191.5 degrees. (for altitude I use an inclinometer available from Bunnings)
I hope this helps. Cheers!