I'm irrigating a newly seeded lawn and meadow of wild flowers with impact sprinklers. After having tweaked the spacing, diffuser, pressure etc. I'm still getting a far more concentrated (puddling) area of water around each rotor. Is there any way to avoid this. It has to do with the impact arm interfering with the stream and dropping more water around the sprinkler. I don't even want to try to reinvent the wheel. Is there any simple solution I'm missing? Thanks!