Thanks Richard,
I have used your setting circles on the Dobsonian telescopes that my Son's Primary School have just purchased. I know it isn't quite the setup that is preferred but for the time being they can get used to the system and we can drill holes in the base later to improve the layout.
This link will take you to the post with the photos.
http://www.iceinspace.com.au/forum/s...d.php?t=111353
Stu.