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Rob,
Based on my ten years experience with Meade SCT’s.
You will always have some mirror slop, due to the baffle and the unique Meade focuser pin arrangement.
I found running the mirror through the focusing range (30 turns) regularly re-spreads the grease on the baffle and reduces movement.
Even with the mirror lock (on a 12” SCT) there were issues.
The Meade rear micro focuser #1206? Worked reasonably well for me, the MAPUG site has details to build a separate handcontroller.
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