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Hi Phil et al,
Yes I think you are correct with the top mount idea. As you have pointed out the GSO style focuser has the two grub screws which are just present to stop dust & muck getting into the focuser barrel. Once removed will provide a very secure anchoring point for a top bracket.
The top bracket could either be curved or flat mounted into two small aluminum blocks which have been profiled to sit flush onto the curved barrel - custom stand-offs if you like.
I think I have a GSO style focuser on an old Newt so will see if mine has similar anchor points.
Cheers & clear skies,
Dave
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