Changing the sprayer to a new to me machine. It’s got twin lines. Pre-emergence stuff will be 300l/ha on one line so which nozzles for that? And the other line which will be used more often would be at 150l average but fluctuate between 120l and upto 200l. I like spraying around 10km/hr maybe 12km/hr sometimes? Any views? I’m a bit out of date nozzle wise as we stuck with flat fans but are there variable rate nozzles now?