Does the nylatron auger bushing on a Whitfield profile 20 wear out? Seems like I have a lot of play if I push up on my auger motor, possibly as much as 1/4" Does anyone know what the measurements are for a new bushing? Seems like a common part, is it anything available at a local hardware store sold as something else, or do you have to pay $20.00 + shipping to get a new one? Thank you for any help! Mike