Shell modifier, best option?

Mr Digital

Hi, i finished the main mesh, but i want to have the other side, (non invisible) i used shell, my best choice for this job, but i got some issues because the curves, is any another best way to make this possible?

This is the part with turbosmooth.
http://i.imgur.com/wtEVNao.png

And this one, with shell modifier.
http://i.imgur.com/NeWuKub.png

Is this possible, but non support edges?

Tomiajayi

try the extrude tool, see how that works.