On Saturday, February 14, 2015 at 1:57:36 PM UTC-6, J. Nieuwenhuize wrote:
The smaller the wing (area, not span), the bigger the relative drag of the fuselage becomes.

On that note, what happened to the 18 meter Diana II that was rumored to come out?

Maybe the same thing that happened when someone asked Greg Cole (Duckhawk designer) if he was going to make an 18 meter version. He said "Why would you want to make it slower?" :-)