One of the hardest things that golfers in cool season turf have to deal with is aerification. We know that you the golfer hates it, we the people that manage the turf know that it is such a positive thing for us to do. Especially when you have very heavy soils like we do here at DMGCC and we use a water that is very high in salts and bicarbonates. Aerification is a must do item. I saw this youtube video and thought it was very well done. If you have the time, please take a look at it.