Thanks Greg,
I'll do a test with the dslr and compare with the qhy8 and that'll give me an idea of how far the qhy8 ccd might be tilted but if both are similar then its definitely at the focuser. I did try spacers but maybe not enough.
Its a normal bintel focuser, but I've got a moonlite on the 10" serrurier I'm building so might be better. I didn't get the threaded drawtube though. I got the one with the 3 screws.
now to wait for some clear nights to test.
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