Create a tube of specific wall thickness

Hi there, nice library.

I've used MeshBuilder.AddTube to create a tube with open ends. If I wanted to create a tube with a specific wall thickness is there a method somewhere to create a shell from a such a surface?

I guess I'm looking for something like this

http://help.solidworks.com/2012/English/solidworks/sldworks/hidd_dve_feat_shell.htm

I think you can create another tube, and then reverse the triangle indices to flip the normals to the inside.
But it would desirable to improve the current MeshBuilder method to support inner diameters and end caps! Sorry, I can't help you with this at the moment.