I have a really good customer that wants me to put in an irrigation system. I have some experience in real simple ones, but not a full yard. I have tried to tell him to find someone else, but he wants me to do it. I know the basics, but I could use a little help. I don't know if I trust salespeople to advise me. I would appriciate any help. I have looked at some software to help me lay it out and figure heads and pipe. Where do I start. If I could figure out head placement, brand name controller, and all I would feel alot better about it.