The new deck fits JD 757 and 777. You can see it on JD website, it looks awesome. You can go from mulching to side discharge in 2 seconds. Not only does it close off the discharge shoot, but it also closes baffles around each blade. I don't have the link now, but looked at it on JD website. I'm thinking of replacing my Exmark, and wanted some imput from you JD users.