Meade seemed to design better mirror locks, Celestron oopsied there IMHO. Note the above mentioned stopper only sells for the C14 - never seen one on a smaller Celestron SCT. With it you till have to have a hole in the back of your OTA.
If you're set on that path - drill and thread 6 holes and insert 6 nylon bolts to lock the mirror and add maybe one or two fans as well. But that's a lot of dissamebly, machining and re-assembly and aligning before you're ready to play (plus ass you said add a cradford focuser).
Why not just say Celestron forget this - whoops and go 10" ACF with its in-built mirror lock and a motor focuser? Simpler all round!
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