Hi Bravlin,

re:
> Its strange. Ctrl+C, Ctrl+V creates pretty messy and dense curves.

Often times curves from intersections can be pretty dense. It's normal and not usually a problem since you won't normally be control point editing such curves.


> It also creates lots of them not the one closed curve.

You'll get one curve for every edge that was selected. Alternatively you can directly use Edit > Join on multiple selected touching edges to make a closed curve result without doing Ctrl+C/Ctrl+V first.

- Michael