OK, so I mentioned in another thread that I'm tempted to cut off the wings of one of my Intrepids and glue on Fireman wings, and make myself a Fireman 8 string. So here is my question: How do I scale up a six string template for 8 strings? I know it has to be scaled up, because I think guitars that are not scaled up for ERGs look ridiculous. But does anyone know if it's as simple as zooming out the body shape until the width of the neck pocket matches the width of the 8 string neck? Or is it more of an eyeballing thing?