Absolutely nothing dust collector...I keep a bunch of rags and a set of gloves down below along with the double bottle foam thingy.To me the little cubby up higher isn't in a good place to access easily. Rags and gloves...well if I need those the door is open already.Armrest is plenty for all the junk I have in there,tape measure,axe spray,knife,pen,paper, coins.....you know the junk..lol.
The cubby below the armrest below the seat seems pretty dumb for ease of accessing anything also but is a good spot for hiding electronics like a tablet.