that I know of. the master always activates to supply the flow of water to the zones that are activated at that moment. in addition to the garden system, I connected an area with drip irrigation by installing a valve with flow regulation.
By the way, I assume you program the drip irrigation manualy, right ?
I don't see the problem, it is true that when the zones are activated, the master valve is automatically activated, when the zone where the second water inlet is connected is activated, the master is activated but does not involve anything, because the affected area takes water from the second entrance. I send you my email so you send me photos of your plant.
I will need to replace my 6 zones Netro by one 12 zones... any idea who could be interested in a less than a year 6 zone device ?