Simple thin beam lasers like this are best for aligning the secondary mirror tilt (focuser axis), and if your scope is f/6 or slower, the return beam can be used for primary mirror tilt alignment. At f/5 (or faster), you'll get a better primary mirror alignment with a simple collimation cap (which is relatively insensitive to residual tilt errors in the focuser/adapter/laser). And if you have the simple thin beam laser and the collimation cap, you can do a pretty good job getting the secondary mirror placement sorted (see Jason's procedure here https://www.cloudyni...ment/?p=5260727
Vic's friend Nils Olof Carlin's Barlowed Laser is another option for aligning the primary. It has the same advantages as the collimation cap but can be easier to read. I used it for a number of years with my 12.5 inch F/4.06. When I did get a Tubeblug, it was certainly easier than the Barlowed laser but both were in agreement.