Thanks. I'll give it a go. And thanks for the other plugins of yours I'm using. Solid Inspector is a life saver, as I'm sure you know.

Hi - brilliant plugin - seems to be working for simpler shapes, but i can't get it to work for the attached file. I put in the shell thickness, then double click (or press return) and the shell just doesn't 'set' - when I click elsewhere the shell has disappeared. Help massively appreciated as I'm working to a deadline. Any ideas?shape that i cannot shell.skp