I have a question for you guys.In one of the pics you can see a fence.Well next season,I plan on landscaping that area and an area to the left that is out of the picture.I am pretty sure 5 spray heads will cover the area but there is an outside chance that I will need 6. I will be using Toro 570 sprays. Now in all my other beds,I have the Toro 570's with 5 spray heads per zone and they work great.I tried 6 and while they still work,performance suffered .Less water was spraying and some of the 12" popups only came up half way. Sooo,here is what I did in that trench along the fence in preperation for the 5 sprays and possibly 6. Instead of a 3/4" lateral,I ran a 1" lateral which will be used for the sprays on that zone. Do you think that the 1" lateral will help to support the 6 spray heads much better than a 3/4" lateral?