Stop guessing on your nozzle angle with this tool, best way to measure your nozzle angle accurately.  Simply stick it in the end of your nozzle after zeroing out your digital angle finder next to your shoe.  Lay your angle finder on the flat surface on the nozzle tool  and measure nozzle angle. adjust your diverter stops  to get the desire up and down nozzle setting.
 
Will work with all nozzles with or without insert.