Ok, so now I know what I've got and being a tinkerer at heart,
anyone know where I could get this light knurled?
Yes, I'm serious..have very dry skin on hands.
But anyway a Quality work like the rest of the project or not at all.
You'll need to post a pic of the light you want knurled, so there's a potential for an estimate, since you give no information about its size. It could be as big as an SR90, or as small as a Solitaire for all we know.
You don't have to worry about Mac producing less than top quality work.