Hi Michael,

>So if you have one big edge, this can be done by using Edit/Trim along with the "Add trim points" option to split the edge into 2 pieces, then you can use Blend between those 2 to >make a kind of fill. But this may not behave well in an area of inflection curvature like you have in this case.

That's what happened to me, there were holes in the fill.