Has anyone used Rainbird's new 5000 series rotor sprinkler heads. Think they came out last winter. These are modeled after Hunter's PGP. Went to a Rainbird presentation today. Got some free sample heads. Being a curious one I came home and changed out a few pgp's in my yard and tested them. I was fairly impressed. Seems like they have more even distribution. It got dark on me before I could really make up my mind about them. Just thought I would throw this out to see if anyone had any good or bad experience with them.