Average laser diameter, or smallest dot that can be made.

[jontelling]

I think even in that very simple set-up your answer will have a lot to do with how fast your dripper is going and how much dye there is in your resin.

OK, Last question.
What's the diameter of the laser leaving the diode. Nothing else. Just this.
EDIT: Or if you know the make/model of laser diode that will do