Cross section optimization

hello everyone

I am doing a cross-section optimization process, i define RO sections as a reference and I got cross-sections with thicknesses 40cm and up (which is not practical).
however, I want to display only tube cross-sections with thicknesses from 12cm to 16cm!!
is there anyone who can help me?

You have to limit the list of sections the optimizer takes as an input to fit your needs.

You can do that by the components in Karamba (cannot recall the name), but also by culling unwanted sections using basic Grasshopper logic (Cull pattern for example).