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Collimation should be one of those things you check as part of setting up. If you can't collimate in under 5 min, you should practice until you can. One very useful trick is to label the screws on the back of the mirror A, B C. Then at the eyepice end stick on a diagram like the one shown in the thumbnail. This tells you what direction the reflection of the diagonal moves when you screw in a particular collimation screw (which you originally work out by trial).
Geoff
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