I’d agree that a pistachio is a different beast than peaches or cherries. It is all just the net amount taken up by the plant vs. the downsides (phytotoxicity, cost, ease of use, etc.). Sounds like you got it dialed in for your crop, but it is still funny how the folks selling product often don’t consider the vast differences between crop types. Experience, and a good eye, are really the test of what works.