I have a Cub Cadet RZT 50 zero turn mower that I bought new in August 2006. I only use it to cut my own lawn. I have 3 acres of grass, no rocks, and no problems with my lawn. I noticed 2 weeks ago that I had "scalped" the grass when I cut it. I pulled out the owners manual and read about the deck adjustment. I tried that, but noticed when I went to measure distance from blade to ground on right side that the blade wobled. I took off the pully cover and low and behold, the deck itself has stress cracks on the right side, and one of the legs that bolt onto the deck had also broken off. Has anyone else had a problem with stress cracks?