You're welcome Steve.
It's not exactly an immediately intuitive way, because you kind of have to imagine the surfaces extending further than the actual end model result.
But generally the surfacing commands will be much more controllable with input curves that don't change shape quite so much between them. In this case especially the area towards the front will be particularly difficult to create with good quality since the lower edge makes a pretty sharp swoop and then comes right in to touch at a point...
But when that swoop becomes a trim curve with a larger underlying surface, it makes the surface able to be far more regular and not so squeezed or stretched.
Sometimes it is hard to recognize at first when an edge would be better as a trimmed back area. If there was a little circular hole in the middle of it, it would be a lot easier to recognize immediately that you shouldn't try to use the edge of the hole for creating the surface (like trying to sweep or network off of the hole's edge directly). When it is on the outside edge of a shape, it doesn't quite pop out as much as being more naturally represented as a trim curve, but sometimes it is...
It might be possible in this case to just do the extension in the very front part only, just right in the area where it bends inward - trim there and extend out so there is a sharp corner just in that spot instead of a bend, then trim back after that.
- Michael
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