I had this pipe, and I split with isocurve (shrink=no) and then I ran Shrink. When I did that (as in the top row example), the result was terrible. The result I wanted was like the bottom row (in that case, I used shrink=yes while splitting with the isocurve). Bug or no bug? I think the results should have been identical.
shrink prob.3dm (3.7 MB)