Astonished free mechanical prog

 From:  Frenchy Pilou (PILOU)
6186.43 In reply to 6186.41 
Copy & move your volume (Ctrl C / Ctrl V)

Select only edges = you have your curves!

(Ctrl C / Ctrl V) again with curves
etc...
et voilĂ ! :)

EDITED: 16 Apr 2018 by PILOU