I know this is a reach and I'm a new member, but it's worth a shot...

I have an old galvy system with lame pressure that needs to be replaced I know. In the meantime, I try and try.

On one edge of the lawn with a lightly curved border I have a head that's not watering well. For brass popups, 180 degrees is too much -- sends tons of water down the driveway. 120 is too little -- leaves unwatered spots. I've tried various nozzles on a 2" plastic popup (the biggest I can fit and still mow the lawn) with MP rotators -- toro rotating heads, and rain bird variable angle. Can't really get enough water out of either of those.

I want to take that 120 degree brass popup nozzle and make it something like 150 degree. Has anyone ever messed with with one of those -- perhaps using a small file -- to change the spray angle?