I was just reading the label for T-Zone herbicide and I saw something interesting about spot application that I never saw before. Hand-held techniques: Wands fitted with flat fan nozzel tips may be used with the appropriate technique. Flat fan nozzels should not be waved in a back-and-forth motion, or in a side-to-side motion, or in a swinging arm motion. Instead, the nozzel should be held stationary at the proper height. Side-to-side motion results in uneven coverage. Dunno. I have my sprayer calibrated at the rate I move it for 1 gal/1000 sq feet with a flat fan nozzel. If you are allowed to use the same nozzels on a boom sprayer what's the difference? How can you get complete coverage if you don't move it?? For spot spraying small areas you would have to be drunk not to be able to move it at the right speed and evenly.