I haven't gotten my hands on many Duponts (they're scarce in Salt Lake City, believe me). Are the new ones thought to be as good as the older examples? I believe that Dupont expanded from a 1 builder shop quite some time ago, and I suppose the quality may be different now? I see that R F Charle no longer carry them, but I'm not sure why.... Specifically I would be most interested in the MD-50.