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Did you buy the specific FSQ106 adapter /clamp that RF make? (I have one if you need one). I believe that ALL Tak screws with the focuser, including the tensioner/placement screws at the top are factory sealed (with what, not sure), and require a drop of acetone to loosen (and if you miss, you will dissolve the lovely Tak green paint, so be CAREFUL!) I was also of the understanding that the RF only attaches to the removed 7:1 knob shaft, NOT the entire shaft (rough focus shaft).
I will fit a Sharpsky Pro to my 106EDXIII, and Dave at Sharpsky explicitly said it MUST be attached to the shaft of the &:1, NOT the main shaft (you will NO get the step precision required otherwise). This is particularly critical if you plan using yours reduced at f/3.6, where critical focus is 40 MICRONS - the non-ratioed/rough focusing won't cut that!
Personally, I will NOT touch the Tak focuser,so designed an alternative mounting system that does not even touch the focuser body at all - it mounts to my Losmandy plate via 3mm thick aluminium bar sock. Solid as a rock. I also designed a compression ring system that attaches to the 7:1 knob WITHOUT removing it.
If you need the specific RF 106 EDXIII adapter, let me know and I part with the one I have.
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