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The Captains Wheel on the FSQ is a bad move by Tak. It can be a source of flexure so tighten it off. I thought there was a version where this was replaced with a solid molded piece. It was an attempt to make a rotating focuser like on an AP or TEC refractor which work very well.
Hence the need for the CAA which is a very useful and practical imaging accessory. You don't need both. The Captains wheel worked well on the BRC 250.
FSQ106ED has been a great scope for Tak but flex in the focuser (not present in the 106N) has been a problem for quite a few. There is a fix on the Tak Uncensored Yahoo site. From memory it involved tightening the focuser grub screws underneath. I think Tak also changed a pressure unit in the focuser from a metal one to a Teflon one or vice versa.
I had one that had no flex even with a heavy FLI proline 16803 camera but read many times of those who did.
The Captains wheel was one source and a bit of lack of pressure in the focuser was another. The CAA has limits for weight as well.
The focuser lock tends to shift focus when engaged so the trick I used was to partially engage it so the focuser was slightly stiff but still moved then fully engage it once focused or better use a Robofocus unit with the correct FSQ brass bushing meant specifically for FSQs.
Internal flocking can improve the colour response of an FSQ which is slightly green biased as the internal blackening paint Tak used has a green bias. Perhaps a bit extreme and not worth it.
Greg.
Greg.
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