I like the angle of the pillars and the lengthening of the fins in the middle sketch . Not really fond of the as you call it the magnum style roof. Again I am no style expert but I like the big fins ,what about angling the roof pillars somewhat rearword with the same length of the fins that you have forward but leave them tall at the rear. Maybe use something like the rear roof section and window style of those mid 60s Mercs with the rear window that slid down .If I remember correctly they slanted backward and had a neat chrome band around them, that might line up the pillars,fins and rear window(lift gate) to a similar angle. Just another option when you got nothing else to do. Hey maybe this should be a monthly fun challenge for all the artist on the forum and those of us who wouldn't know which end of the pencil to hold could throw out" what if "suggestions. Ed