after you finish the step 12 or 14, you can extract the curves from solid body.just follow the step as below:) B2 a6 t' B2 O& j9 ~
1: make new layer for new curve.6 B7 R; G4 @& p! N
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.1 ^5 w3 ^0 e- L/ `) j; t" o, g$ E2 x
3. make the solid layer invisible but the new layer of new curve selectable or work. + F3 T7 K/ U, U5 @9 J4. that's all.