I have had a lot of problems with Hunter rotor heads from PGJ's to I-20's. I stopped using PGP's a few years back because I had so many that didn't rotate right out of the box, I switched to I-20's to have several of them blow their heads off on a new install right out of the box. I went back to PGP's to find the same thing as before...not turning. I have also had many PGJ's stop turning as well. I am thinking of using Weather-Matic next year, anybody using them and what do you think on them?