That sounds like a good way to determine "squareness". I haven't actually tried checking that the reflections of the cross hairs line up...it is probably the easiest way. I was wondering if there was some way of making the alignment visible. I will give it a try tomorrow...I am looking forward to spending some time tomorrow afternoon to take the focusser off and move it back a tad as I think it is a couple of mm too far down the tube. BTW, it will give me a chance to avoid seeing the footy...avoided it at school and still do!
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