Thoughts on my collimation of 9.25 sct

From an EdgeHD 9.25 noob:

Choose a star overhead.

Defocus by moving the focus knob in the same direction as the autofocus when it finishes. I heard should be counter-clockwise.

Make sure the star is centered before judging the collimation.

Given that, the image is very close, hard to improve, but I see it a little fatter to the lower right. You'd be forgiven for stopping there, though.

Don't overtighten the screws. Just tight enough so they hold. Overtightened screws will give distorted star shapes.

Should hold collimation a long time. But it's easy to check if you suspect it's gone a little out.