I have a smallish park-type property that I maintain for one of my commercial accounts. About once a year, some punk comes and punts the turrets off of the heads in the middle of the night (system starts @ 3:00 AM). The customer is getting tired of having to pony up the cash for replacing all the damaged heads every year, so... anyone know of a head that is more resistant to this type of punkass vandalism? Currently, the system we're using RB 6504s. I don't know how much value there is to swapping to stainless shaft..