As I'll be building Exception/Deception wings in the not too distant future, I wanted to get some things sorted out with the design.

Here's the brain software calculation of the MAC. As noted in the attachement, Kimbro and/or Bridi likely rounded off the effective span to 30" per panel and used a rounded off MAC of 12.5".

So that simply gives 2 x 30" x 12.5" = 750 sq in of wing area.

David