My preference for edging a lawn is a gas edger. I am not proficient enough with the weed eater to make it my go to approach. The edge I put on my yards is 100 times as clean with the gas edger as well as being easier on me to do. Now having said that, I have run into a decision. Most, if not all the yards I am cutting have irrigation systems in place and the daggone sprinkler heads are predominantly placed right on the sidewalk/driveway edges. I don't know if it's a standard or what, but these guys (irrigation contractors) put those things up against the shoulder of the concrete. NOW, here I come right down through there with Mr. gas edger with steel blade. I have yet to get into one of the heads, but it looks damn possible to do. IMO, a direct hit, with my edger just a tad off of the concrete edge, to one of these heads would probably destroy one of the things. Has anybody here who uses a gas edger had this happen? Am I concerned for no reason? Before I get too deep into offering this procedure to my customers (as I have advertised it as a "plus" as it results in an extremely clean edge) should I reconsider? What do you guys think is the possibility of me having to repair or change out sprinkler heads if I stay with the steel blade gas edger?