Hand cranking the stabilizer jacks under each corner of the trailer is unpleasant at best.  But a crank/wrench isn’t very expensive and is easily cut with a grinding wheel.  So I sliced off the handle and made a straight extended wrench out of one.  Now, chucking this up in a cordless drill/driver I can raise and lower each jack in a moment or two.  The light on the driver helps guide the black socket onto the black stud, shadowed under the trailer.  The driver/impact wrench set fits neatly on top of my batteries in the tongue box.  The impact wrench is the perfect tool for operating the leveling device.