Thanks for that!
Indeed, I'll have drippers at ~3 different levels. Given that I already have adjustable drippers (non-PC), I'll set them up and measure the water collected over x time period and adjust accordingly. I think that I'll be able to determine a rough LPH, from drops per second (or mL per second/minute) and adjust. Then look at how things change when house members are showering, etc. I'll see if I start pulling out my hair as slowly down some drippers might blow out others!
Would there be benefit into adding a pressure regulator before or after the 5micron & GAC filter? eg, a 300kpa : https://www.bunnings.com.au/pope-300kpa-pressure-reducer_p3121926
So then, the pressure is constant at the source?
Again, thinking out loud, depending on the number of drippers, 300kpa might be limiting? (probably not for my limited set up, but for others to consider).
Thanks for your help.