I put these new blades on my Quick 36 a few weeks ago. I noticed that they did a nicer job with mulching with only one problem. I had grass pieces flying all over the place to the point that the deck had an inch worth of clippings laying on it and I was covered with grass (and probably swallowed a bunch too). I then decided to see how things would work with side discharging. I think this was the solution with these blades as the side discharge still does a decent mulching job and I am no longer covered in grass at the completion of mowing. Just an FYI for anyone who might be contemplating or using these blades.