Next you will want to add an automatic oiler on the tool lines, then coalescing filters on the spray lines...then you will get two of the lines mixed up and spray with a line on the auto-oiler.....wait, that was me.
Seriously, I would recommend building a header manifold and putting an auto-oiler on one line for air tools in addition to your air drier. Just mark the tool line to keep separate from the sand blast and spray lines. it will keep the bearings in the die grinders a lot longer.
Scott