So instead of cutting the curve of the sleeve (as the original tutorial describes) and using that for the sleeve ruffle, you can see here that I cut and used the bottom (or cuff end) of the sleeve on a slight cure,
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And then gathered it along the cut side
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Then I sewed the gathered side to a contrasting ribbon and attached the Sleeve Ruffle at the side front and center back (to either side of the buttons).
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