Thanks very much again, Michael! Moreover, thanks very much to Jesse too!! the tut is quite usefull for me, since I also work in a jewelry mfg in China, and I am also in charge of designing and draw 3D models according to different request.

Michael, Actually I was trying to draw the steel cable(7*7) in V2 by using "SWEEP", just like what you said, firstly I drew a star-shaped lines, and I also found when I was doing the "SWEEP", there was an option of "twist", I tried that "twist" many times, but the curve I need seems couldn't be twisted around the center rail in some degrees, is there someplace I ignored to make sure the "twist" proceed successfully?