ok guys. i have a 04 28efi that has almost 2000 hours on it. it has never had any belts replaced,only 1 clutch. it cuts ABSOLUTELYPERFECT! BUT............ theres only one problem though. i have a 06 (i think) that has maybe 400 hours. every since it was brand new it has never produced the perfect smooth carpety cut that the old one does . i have checked to make sure that they are cutting at the same height and the new one is cutting a 1/4 of an inch higher than the old one. BUT even if i cut a half of an inch lower than the old mower it STILL doesnt cut as good. i have changed deck belts, all the specs on blade overlap and changed the deck pitch from a 1/4 to an 1/8 of an inch and it still doesnt cut no where near as good as the old one. the blades are in perfect condition and the dealers shop has checked everything as well. the rpm's are correct also. the difference visually between the two is the old mower sucks all the grass up and cuts ALL of it off even when your looking over the crest of any yard you want to look in. the new mower cuts and you can walk through the grass and the majority of the grass is cut but theres alot of blades sticking up that isnt cut,(stragglers i think you call it). in order to make the new mower cut as good as the old one you have to run double high-lifts. the crappy cut is at anywhere from 2 1/2inches or higher at any speed. whats wrong with this thing??? ive done all i know to do. its very depressing for me to not have a beautiful cut in ANY yard that im mowing. the grass type is all a mixture of fescue and your normal weeds. theres no line of uncut strips of grass left in between the blades though. did they make some kind of small changes to the ultracut from 04 to 05 or 06?. i would really appreciate it if you guys could point me in a good direction besides throwing dynamite at it. thanks.