A brilliant nozzle those. Used them here for several years now.
As you say crank em up to 5 bar and you will get great coverage and no drift. I have gone higher still without an issue.
At a tenner each they' re not really that dear and will go on to cover many thousands of acres.
I was even advised to keep them for the next sprayer. I replied that l had no intention of changing sprayers anytime soon. Doesnt matter they said whenever you do those nozzles will still be good. Salesman patter maybe , but l couldnt fault them.
I brought a random 2 off the sprayer to the show in Punchestown earlier this year and had them on the tester on the Fossland stand. I was told they were perfect . Didnt tell him they had almost 10 000 acres done or they might start making them softer or dearer.