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Hi Frank,
The only problem with relying on just a laser collimator to collimate ,you have to ensure that instrument is accurately collimated itself.
I use 2 instruments, a Cheshire eye piece and a laser collimator to collimate my 12” f5 dob, 8” f5 imaging newt and 6” f6 imaging newt.
I made up a V block to test my collimator against a wall 4m away inside the house by rotating it 360degrees both ways and ensuring the red laser dot remains stationary.
I have found the Cheshire in most cases has been more accurate than the laser collimator. Hence one instrument checks the other.
For observing super accurate Collimation is not so critical but for imaging it does make a huge difference to your Star shapes in your images.
Cheers
Martin
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