Instead of having to create a different head type for each zone (to account for differences in watering rate), it would be great if the two variables of watering rate and efficiency were added to the Advanced settings for each zone. It could work like the current variables for vegetation type do, with standards from the nozzle type populating the Advanced settings. There could then be sliders to dial it up and down for those of us who were crazy enough to measure it for each zone.
For example, I have some lawn zones (rotors) that are at 0.6"/hour, 0.7"/hour and 0.8"/hour. Today I have to create separate heads for them all, but it would be better if I could just enter those variables in each zone if I have the data.