Celestron C11 Secondary holder
thingiverse
Over time the Celestron C11 secondary holder can crack or warp. This is a direct replacement. I've tested with Bob's Knobs, but should work with original screws too. Also provides more adjustment range in case (like me), your mirror lock throws your optics a long way out of collimation.The OpenSCAD file has a lot of parameters. Should be reasonable to change to C8, etc. No guarantees this will be exactly right for your C11, as I can only test on my own, and it's pretty old. re-use your gaskets.Print with something good for UV, heat and outdoor conditions. ASA recommended.
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