Just got one in for service. Looks OK but will require cleaning oiling, etc. At some point in time, it appears that someone put steel bushings in the front brass plate on T2, S2 and C2. The pivots and bushings don't look all that bad, but should I knock out the steel bushings and replace with brass or bronze? Or, perhaps, did some of these come from the factory this way? Seems to me that steel on steel would be tough on the pivots over time?