When doing quotes on residential systems-up to 20k sqft, do you do scale drawings of the property with head placement, etc. If not, how detailed do you get, and how do you arrive at a quote. Also, what do you show the customer with your bid? We are starting irrigation and did a 5 zone system by just doing rough stepping. It worked well, especially since you usually have to improvise anyway and the job was small. However, I can see future trouble -pulling pipe out of sequence or forgetting to pull wire with pipe.