Stuff Happens, it's winter, minds are coasting...not a problem. T-jet has a very wide variety of Air Induction Tips which have less drift so check those out also. Greendoctor got me on those and they are wonderful. For what it worth, I can walk with a 5' wide boom and cover 1K in 1minute and 35 seconds. Of course that a straight pass without dodging shrubs or flower beds. The good thing about walking booms is that you can be so precise around trees, flowers, etc.
We all are merely gleaners from the masters who were here before us.