I have a 20-year old single-stage Ariens with the rubber paddles (impellers). Paddles are original equipment. Had not used machine for about 4 years until yesterday. After going about 25 feet, and not hitting anything that I'm aware of, the paddles literally shattered into about 15 pieces. Would this be a typical breakdown for paddles that old? They cost $80 for new ones alone so not sure even worth fixing. Any feedback appreciated!