Domed shape for Structural Parts

Basically,It's Hard to get that nice Spherical Shape but it's possible.
I suggest of adding a "Domed" Option in the Part Properties like a checkbox.

This Feature would take effect on the following parts:

• Fuel Tanks
• Fairings
• Struts
• Interstage excluding Side Interstage

Nosecones might be less used but if this would take effect,let's just add better performance on the nosecone.Instead of the Pointed Part (when top or bottom is resized),another Shape would appear.

The Purposes are:

• Making it easier to make Spherical Shapes and Capsules like Descent Module of Soyuz
• Less Parts

I Would make a VERY CLEAR illustration and explanation in the Future.