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I don't think this answers the query re laser collimators, but I've always used the sight tube, Cheshire and autocollimator eyepieces for precise collimation. Just like Alex said, you need to get the secondary right before you do much else. You should also check your focuser to make sure that it's perpendicular to the light path - shim it if you have to. Interestingly I don't see many autocollimator eyepieces on the market anymore. I'm not sure why, as that was what I used for fine tuning every time...I wouldn't be without one if I had another reflector.
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