just and Update, two years later, mower is still working fine, no damage to the grease zerk that is mounted in the bearing housing inside the mower on the rotor , I did hard face the grass blades the last time I changed the blades out. I used a powder hard facing torch, blades blades have lasted about 4 times longer than usual. I know hardfacing blades is not recommended there is risk of the hard facing chipping and causing injury or property damage,