Hello, hoping for some advice on a sprinkler system install. I am attempting to irrigate an area approx 52' x 189'. This area has a radius on both ends. 1" pvc piping was used throughout this installation. This installation is pressured by a large hydro pneumatic tank. I can adjust the pressure via an inline pressure regulator. The current range on my hydro tank is 74-52 psi. We have it set to deliver around 58 psi to our facility. I installed 6 toro flo pro xl part #53823 5" pop up rotors. These were installed directly down the centerline of this area, equally spaced. The actual distribution in terms of radius is per manufacturer spec. The problem I am experiencing, is the distribution inside the radius is poor to say the least. Hope this makes sense. My question to the experts is in two parts. 1) Should I replace these units with a higher quality product? 2) Which unit should I choose?