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Is there a single grub screw holding the diagonal in the SCT rear adapter? If so, does the grub screw press on the diagonal barrel directly, or does it press on a compression ring?
I removed the compression ring from one of my 2" adapters and drilled and tapped an additional 2 holes at 120 degrees for 2 extra grub screws to prevent my CCD camera from slipping.
Cheers
Dennis
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