I am using a Versalab laser alignment tool and sort of love/hate it.
I love it for the ease of determining enlarger misalignment; and I hate it for the ease of determining enlarger misalignment and then spending hours trying to get perfect alignment.
On my Dust 1840, things are almost perfect. The baseboard and the negative stage align perfectly ... which is good because I have no idea how I'd change that except to fiddle with the baseboard. However, the alignment of the baseboard and the lens is off slightly. I don't know what to do about that to keep all three aligned, but at least the error is consistent.
Now we get to my Omega D5xl 4x5 enlarger with the color head. Things are a lot different there. I manage to just about perfectly align things one day, and the next day they're totally off because, as best as I can determine, enlarger alignment gremlins break into my darkroom and re-misalign things. Grrrrr!
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