When a curve is converted to an outline having the ability to convert the outline back to a curve would be useful. Having to trace a curve down the middle of the outline takes a lot of time.
I often get drawings from others which the curves have been converted to an outline that I need to work on.
easy peasy not so easy.
Break your outline.
You may have a bit of work if the contour runs into trouble spots ( extra goodies around )
On a separate layer copy/paste the objects to work (so you dont lose original)
Break Apart the areas to work on. Select the 2 segments to find center.
Make sure curve direction is the same
Goto Blend > change 20 to 1
Select your lines and apply
Reducing nodes helps alot, so do that.
Alot to explain but it does work - Experiment!
Works w/ Text too - just bare with it, it tries its best for center