At Home Depot, I've seen both Rainbird and Toro brochures that describe their products and they also have a worksheet on the back of the brochure with a grid, etc. where you can lay out your design. They also offer a service where you can fill out a form, etc. and send it in and they'll design the system for you and then send a bill of materials, etc.

I never did that because it seemed like a lot of work for all the information they wanted. But it may be worth it to you to have them do it....

Thanks, Randy