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I have that collimation site in bookmarks already but I'm really not keen to touch it while the focuser seems to be moving around. Curvature plots from ccd inspector seem to be all over the shop even on the same target. If I set the tension screw tight enough to hold the camera and wheel, then the focuser won't move in properly, it will stick. If I set the tension screw so the focuser will move properly, then it slips if you try and refocus at too high an altitude.
Yes, motor driven focusing will make me happy, the narrowband filters seem to need to be individually focused and I want to do it from inside not outside. RGB filters are fine and don't need it, but there's no point doing RGB from the backyard when the moon is up. So about 80% of the time it will be doing narrowband.
I might strip the focuser down and rebuild it first I think.
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