Indeed. The roof is always my majour concern. But with the last two sketches I put up I studied up rather intensly on the dimensions and proportions of classic car, most specifically the 60's Ferraris and first Elan. I really tried to make a car that would be beautiful from the culmination of petty details, namely some of the line shifts like the transition from hood to windscreen or the transition of front fender to rear fender on the door ledge. I still have yet to really come off with a solid design yet. 