I am trying to design a system for a customer. This will be my first install and customer is willing to give me a shot. The front yard has ditch. All of the systems I see around here do not have heads on the side of the ditch closest to the road. Is this acceptable? It seems coverage would be compromised. It seems trenching and getting pipe into a ditch to be near impossible. Also, how much overlap do I need? I am planning on using Hunter PGP and thinking of a radius of 25' t0 30'. The static pressure is 82psi and the water meter says 1x1, so according to Hunter the working pressure is 55psi. Is that correct? Any info advice is greatly appreciated. Please do not discourage me from taking on the job. Truth is I am really excited about irrigation endeavors, and I am trying to educate myself as much as possible on irrigation. Constructive criticism is also appreciated!