My 35 trees are 7 years old and getting 10 feet tall. I decided to upgrade my echo pump sprayer to a Stihl gas sprayer.
After my first use I’m impressed. Its easier to use and faster. I get much better coverage with the mist and have less waste. I also end up with less spray on me since I can stand back from trees a bit
It’s not cheap but I wish I had upgraded sooner. Hopefully it lasts many years
Hope this helps anyone considering it.