@AzJazz Did you buy the Orbit catch cups? If so they have a nice calculator that will give you a precipitation rate and efficiency. You would then compare them to what you have for the nozzle in your current setup. Assuming that they’re not the same, create a custom nozzle and attach it to your zone.
http://wateringschedule.com/get-started/#/stations
This link will show you how to click through the website to get the details that you need:
That soil test suggested soil amendment of sulfer and fertilizer made a big difference for me, in addition to spraying Ortho to keep the rabbits away add much as possible.