I had several Sunstars with the 60" decks, and I was told that the outer blade chops the grass up better, and also, I did remove the baffle between the second and third blade, install a different belt since you bypass a pulley, and then use a standard blade. Results??? Well, the deck uses less hp, but leaves a streak sometimes between the second and third blade. Less suction to pull the grass up from the right front tire, so I changed the deck back.