hi guys, please excuse the typing, broke my hand. anyway, i have a 2003 52" laser HP, with 45 hours on it. at around 30 hours, i had some brake shoe problems, and the dealer fixed it under warranty.. (thanks terry). at that time, i also asked the dealer to change the blades for me......when he returned it, he said he thought the blades were fine and did not need changing yet. i was disappointed. i just changed them myself....(one handed)...i had a hard time getting them off even with an impact wrench.......putting the extra set on that came with it. (my dealer gives two sets with each mower, i don't know if all do). Some guys at the firehouse who have some pretty big accounts, who run dixies, looked at my blades and said they looked ruined...not hit with anything, but worn down a lot. should blades last more than 45 hours? i do have a little sandy soil, but i think if my dealer took them off and changed them when i asked, they would still be good now. the guys at work change theirs every 20 hours or so. the guy at work says his dixie blades are much heavier, thought mine were cheap. my question......what blades should i buy? are there better ones then these that came with the exmark? i do not think 15 more hours made much difference in them.....they should have been changed when i asked.....i was willing to pay them for doing it....should blades wear down to being ruined in 45 hours?....how often should you take them off and sharpen them?.....i think they would have still been good if they were changed when i asked......now they may be ruined. the blades do not look like they have been hit with anything, just worn. we have had a lot of rain so far this year, so nothing has been dry. i clean underneath the deck regularly. also, can i put wd-40 or never seize on the blade bolts? i almost did not get them off, even with a impact wrench.....i think the factory put them on too tight. any recommendations?