Riverstone Irrigation is a contractor that you dream of finding. From initial contact, to job scheduling, and every step of the way, quick responses and on time. The crew know what type heads to use, and where to place them, beyond what I was expecting. I am not sure how many heads we have, but there are a lot of them for 20 zones. We made a few changes and added some extra features, and no extra cost. At the end, we were given a bag of extra parts to fine tune the flower box and drip line heads when we did the final walk around to see how it all worked. All of this and a very friendly courteous crew doing the work with a lot of respect for the property, and our needs. Well done guys, looking forward to when we can start using the new system.