Sheet Metal configurations

Hi,

I'm trying to make a support (as the one attached to this post) for some piece of equipment. I've made it in sheetmetal and welded two pieces of sheetmetal to the sides. Now I need to have a very similar support but then twice the length. I usually add a configuration and change the extrude feature to the new length and choose "This Configuration". However, I can't find this option in the Sheet Metal dialogue.

Any ideas here what I'm doing wrong? Or is it what I want just not possible and should I create two seperate parts (and two seperate files)?

thanks!

Robert

SolidworksSheet Metal