OK, my wife is redesigning some adjoining flower beds so I've got some changes. I want to use mostly rotors, and I've got an area where I only need a 15' throw and was thinking of using Hunter PJG's. Now TMC2004 states that the throw will be 5-6' short because they test indoors - does this mean I can only expect 10' out of these? Also, I need to use some spray nozzles with about a 12' throw and an adjustable arc. I've used the adj Toro 570 series, but they seem to change the arc setting themselves. Are the Hunter PS series good for holding the arc setting? Is there any adjmt on the PS heads for throw?