Part of our irrigation system has a series of Rainbird 1800 spray heads that throw water across a sidewalk to hit some shrubs. The shrubs do get watered and I adjusted the AP heads so there is a direct spry but I there is a fair amount hitting the sidewalk. If I simply replace them with another 1800 that is taller would that work or am I asking for trouble? What do pros do when designing for such a situation?