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well I don't know if I'm ever going to get this.. I just tried to adjust the secondary using the idea of putting paper on the tube opposite the focuser as suggested by raja235 and also described in the catseye instructions, rotated the secondary so it facing square onto the focuser then adjusted the center screw until it appeared to be centered (judging by the outline against the white paper) but now I can't get the laser spot anywhere near the center mark by tilting the secondary, so at this point my scope is basically out of commission I guess - wish I'd bought a refractor. Anyway, thanks for all the attempts to help me, I guess I'll have to wait and see if the sight-tube makes things any clearer for me.
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