after you finish the step 12 or 14, you can extract the curves from solid body.just follow the step as below:& t& H" N& {& U& T0 ^
1: make new layer for new curve.* G3 U& G' {8 c! }. Y$ `4 u, U
2: under modeling, choose Insert--Curve from Bodies---Extract---Edge Curves---All in Face, then select the face of solid bo dy,---ok---0k---Cancel, leave the Extract curve dialoge.% F. a8 D0 J2 C
3. make the solid layer invisible but the new layer of new curve selectable or work.7 N R1 W0 W3 N+ H, Q
4. that's all.