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Brett, I use an OSC ST8300, and have no issues with focus- I simply use a Tak extension tube and the Tak 50.8 adapter and it comes to focus no issue. With a FW, I used the short Tak extension tube and 50.8 adapter. See picture with OSC (the OAG is gone as I prefer the guidescope - without OAG I need the longer extension tube)
Yet you have an INWARD focus issue. Odd. If you take off the CAA (camera angle adjuster), you will get an inch or so extra inward travel. Rotate the camera with the capstan wheel and lock it off. Easy
Removing the capstan wheel achieves nothing, except you will have a focuser on the floor... yes, it holds the focuser body onto the tube.
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