Combines wires in concave in sts

What kind of wire change have you heard aboutIJ The concaves are the same, and can be interchanged, except front one which has feed in plate welded to it. Some aftermarket have the feed in plate bolted to concave so it can be interchanged also.

last fall I thought someone said that the wires were not lasting and jd was replacing them. maybe just a rumorIJ