On my first install a year ago, I used Toro multi-stream rotors on a zone that seemed a perfect fit for radii and balanced precip, on a well. I recently had to replace four of them because they stopped turning, had several streams no longer spraying, etc. Stryker says the multi-stream design is very high maintenance. What has been your experience if you have used them? I am using some MProtators on my own system to see how they do, so far so good.