ZD1211 mows bad.....

I have a brand new ZD 1211 and from day one it has mowed bad. The grass builds up under the deck something terrible, especially under the blade farthest from the chute. I put on a set of Gator blades and it helped get the grass out from under the deck, but it definitely doesn't suck the grass up to provide a clean cut. I am looking for solutions that work for others

Are you mowing when grass is dry or wet?

They're generally wet in the morning here, it improves in the afternoon when it dries out but I'm not happy with how it lays the grass out even when dry.