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I found some old posts here on IS explaining a few techniques for moving along. So I trimmed and faceted my lap more often and pressed it often and took longer one third strokes to get down the turned up edge and it seems to be working.
Those turned up edges are starting to go and the Ronchi lines are starting to straighten up as the edge is more polished. Suppose to finish from centre out but perhaps my Bartels method and the oversized lap has over emphasised the correction at the edges. Still a loong way to go in polishing for such a little mirror but moving forward all the same.
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