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Thanks for the interest everyone. I enjoyed making these scopes. The dob setting circle and Inclinometer is a great addition Mark. It works best of course with a wide field eyepiece.
After the star b que experience, I've decided to make a narrower circular bottom ring for the 12. This will make it easier to rotate the tube at all elevations. There were some shorter visitors who had trouble reaching the eyepiece. As it is, the octagonal ring hits the rocker when it's rotated.
Interesting idea re the balsa I might try that of If I make another circular ply tube. More for cost savings than lightness. For small scopes I think the octagonal tube is hard to beat and is relatively easy to build.
Rod
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