It comes outfitted for a medium spray and I wanted to have the option for a fine spray as well, but when I look up parts for it under "fine" I get head, tip, needle, crown regulator, et cetera. So what all needs to be changed to make it a fine spray? You'd think it was practically the whole thing by the search results, but if it's just the needle or just the tip or whatever it would be nice to know.

Thanks.
-Rog