I had a Repro come to me with a little up/down movement of the stop-plate. A closer look revealed the bottom of the dovetail required a little peen to tighten the plate up. I also didn’t realize, until closer inspection, that the plate relies upon the close fit of the screws head and the hole in the stop-plate to restrict up & down movement. In other words, the screw doesn’t bottom out on a shoulder.
Unfortunately, the design isn't conducive to linear wear. Rather, it'll worsen rapidly once the plate develops a little movement. Neat design but poor execution IMO..can’t believe Parker didn’t use a stop-screw. That little screws head should be kept flush with the extensions face, at all times, for max rigidity.
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