So, if you enlarged it 20%, span would be 40.8", length would be 28.5", area would be about 308 sq. in.. I don't know the fuselage height, but if the original was 5", the enlargement would be 6". It seems like a simple 20% enlargement would work. I realize that once you start fudging with a slimmer fuselage, more wing chord, etc, you've totally missed the point and it's not a Sterling Skyshark anymore. (I'm sure some people would feel that way about ANY deviation.)