My Honda Harmony II HRT216SDA operates well. I just re-sodded my lawn with St. Augustine. From my boyhood recollection and online research, this grass is best cut with as sharp a blade as possible. Other factors are probably relevant. I plan to bag clippings, as mulch build-up is a St. Augustine characteristic. My father had a Jacobson with FOUR (4) separate short blades mounted on a cone-shaped housing. It gave a wonderfully precise and even cut. Is there a blade other than the factory stock version for my HRT216SDA that I should consider? Or should I stick with the stock blade and keep it sharp? Thanks.