I use the $5 collimation cap and then Farpoint Autocollimator (as fancy collimation cap) to extra fine tune things.I tried the Glatter while back and tried lasers, but always felt i got much more precision with the cap.
Also, the lasers have a convenience factor for Dobs that you don't need for a Newt astrograph where you can look and reach knobs at same time.
Look at my M13 shot -- you can see the Coma Corrector astigmatism -- you can't get better collimation than that.
I have a Cheshire good one that i can see from reviews that it does a great job, i use it for my 8" F5 Newt nicely, but with my 6" F4 i feel it is more tricky and harder, so i can't depend on it always if it will waste my time to use it to make it right, i need to get something else maybe to do it faster and precise.
https://www.firstlightoptics.com/other-collimation-tools/premium-cheshire-collimating-eyepiece.htmlAlso i have two affordable laser collimators, GSO and SVBONY, i collimated the GSO one to make it ready to use, and also i feel like with 8" F5 it is easier than 6" F4, the view and marks all are wider or larger i see on 8" F5 than 6" F4 somehow, i tried with 6" and i got the collimation very close, but sounds the problem is with the Newt knobs and screws itself rather than the collimators, but i wanted to make sure that collimators aren't the issue, if yes then it means i must replace them to something better eventually.
I bought Bob's knobs from my 6" F4 secondary mirror, it is the one that i ordered as accessories with my Newt, but it didn't work as the secondary mirror sounds is not connected to those collimation knobs [or screws before], i tightened the center lock of the mirror and the knobs working, but it became like impossible to adjust it when i tighten the center screw, if i loose it then knobs are no longer working, in fact all the problem i have with my Newt are from the secondary mirror only even with my 8" F5, the primary is super easy really, and the primary mirror of my 6" F4 is also somewhat not smooth collimating as with 8" F5, but i think if i can find a way to control that secondary mirror collimaion then anything else will be no problem.