I have a ZD28 with 60 inch deck, I bought it this spring. Have had a ZD21 with the stamped deck for 4 years. I was not happy with the way the pro deck was dispersing the clippings in taller, thick lawns. The old stamped deck was better. So I called my dealer about it and he contacted the factory. They sent some really high lift blades (which my dealer paid for) for us to try. What a difference. They really did the trick. Now clippings are dispersed nice and even with no clumps across 12 to 15 ft area. Just thought I would pass this along to the other ZDpro deck owners.