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Thanks for all the tips guys. I pulled it out of the dome yesterday arvo for another go and recentered the focuser again and got the secondary done before that storm rolled in. This time the secondary looks exactly as it should do in the sight tube. No flat spots and perfectly centered.
I'll make up a cardboard gauge today to measure the gap around the primary but a quick knuckle test in the gap shows it's pretty close. Rolling the tube on the workbench reveals no warping in the tube. My baader laser died earlier this week which is a shame, as barlowing it and adjusting the primary that way last week gave the best results in ccdinspector.
Looks like it will be clear enough tonight to get another look.
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So much for the knuckle test, I found the primary mirror was easily about 4mm off center axis.
Last edited by Tandum; 16-10-2011 at 02:41 PM.
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