Carol,

As was mentioned earlier in this post, all one would have to do is to figure out what scale factor they would need to make it to the appropriate size that they would need for their particular base size.

However, I had so much trouble trying to get the original PDF file (that SkyArcher made) to the right scale, that I designed my own for my 12” DSO. The problem WAS NOT with SkyArcher's file; the problem was with Kinko’s getting it done for me. They tried numerous times and NEVER got it right. That was when I decided to do it myself. I made the circle to the exact size that I wanted for my scope. That is the PDF file that Gordon posted.

I was reading the post that Gordon had posted in regards to his new 12" Lightbridge, he mentioned that he needed a circle that would fit his base, I thought, well, I have one that I made that worked for me, why not pass it on.