I have owned a Lawn Care company for 5 years now and been in the business for 9. I only recently have gotten interested in the irrigation aspect of this industry. I took a residential design class put on by Wolf Creek a Rainbird distributor. I feel confident in the ability to do this, but I also know that it is always alot easier on the outside looking in. I do not want to just jump in a screw up someones lawn. I have been reading post on here for several weeks now and done some research. I still have questions though. I s there a GREAT book or videos etc. that can further my knowledge. I know that Rainbird puts on classes along with other companies in fact Wolf Creek does, but time is at a premium this time a year and a good reference would go along way until the off-season when I can attend another class.