after you finish the step 12 or 14, you can extract the curves from solid body.just follow the step as below: 7 q! L7 E' b1 j6 m1: make new layer for new curve., E0 {8 L1 L. [- K1 {9 O
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. l4 D- s/ ^: a* L3 e* D, s
3. make the solid layer invisible but the new layer of new curve selectable or work. 3 |! g1 N3 Q: b8 [4. that's all.