Wondering how many of you aerify. I havent aerified since my golf course days, was wondering if you guys have problems with hitting irrigation heads, and if you mark the heads or does the customer? I have a few yards that could use it this year, 2 acre lawns(lot of heads). Looking at Jrco, and some pull behind slicers, what do you guys use and which ones get the job done. I would like to add this service, but need help on these questions.