I'm new to the forum and need help. I have a Z-Force 60 Cub Cadet and it is suddenly mowing uneven by at least an inch. I sent it to a reputable repair shop and they explained that the deck is not balanced. They contacted the manufacter and haven't heard back. My yard is nearly a foot tall and no one knows have to fix this problem short of adding 20 or 30 pounds of weight to the high side of the deck. Any thoughts. Thanks