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Thanks to all of you for your help. I've got a few files I'll be taking to Office Works for printing.
My choice is either to print the file for the GSO 10", diameter 54. This would be good as it's my actual scope. If I go with this, I'd cut a notch in the top rotating part of the base so that I could see the setting circle from above.
Otherwise, I have another file of 46cm diameter. If I go with this, I'll go to Bunnings to get them to drill a 3cm or so diameter hole above the setting circle. This wouldn't be at the edge of the top part of the base - it'd be inset a bit. I think I prefer this finish as it seems neater.
The other things I've noticed is that some people seem to attach the setting circle to the top part - the rotating part - and fix a pointer to the bottom. This seems to avoid the need to cut a piece out of the top, rotating part of the base. Any thoughts on this difference?
One last question, how would you all recommend fixing the setting circle to the bottom part (non-rotating) part of the base? Double sided tape or should it be held in with a screw, perhaps counter sunk so it doesn't interfere with the movement of the rotating top?
Thanks again for all the help.
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