I had a problem with the 1.25 versions in my LB16.
The adaptor adds another inaccuracy to the alignement and the barrel is to short.
I now have a 2" from Bintel. I feel its is doing a good job. There is a threaded mask for the laser beam that can be changed to a barlow attachement.
I'm very happy with it.
It's not as cnvienient as the Orion Laser collimator (you can observe the dot white adjusting) but the result differed each time you moved the collimator.
https://www.bintelshop.com.au/Images/Stock/8428.jpg