Well Andrew, If you can achieve the low and thin "side" profile of the roof in your artist sketch....then I personally think you captured what a Austin Healey GT Coupe "should" look like if designed properly. At least in my humble opinion. I, like most of the people in this forum find your project very interesting indeed! I was wondering what the roof would look like if there where slight bulges on top of the roof, such as the "Gurrny" bubble found on the Ford GT. Or a thin rib formed in the center of the Roof line to give it some interesting detail. Just a thought.