Yea this should have been a day one implementation. The fact that none of the timers know about each other you can’t just setup smart watering and let it got. I’m sure 99% of your multiple timer customer base does not have enough water pressure to run more than one zone at a time… My sprinkler heads won’t even pop-up if the shower is on. I am pretty aggravated that I have to setup up manual schedules for both so they don’t both try to run at the same time. The only advantage this product has over a 10 buck timer is remote rain delay.