My banjo is making an intermetent noise , somthing rubbing every half revolution. The rpu had a bent brake drum and thought maybe it was that. Replaced both drums and shoes and the noise is still there. I never had a banjo apart , but I am thi king it is a bearing. Is there a bearing on the end of the axle? Can I just remove the bell , change the bearing and reasemble ? (God that types easy) It is the p***enger side seems the noise is coming from .