I scaled this EZ- Fly down to a 30 inch wing span from the original 36 inch one published on RC/Groups.  I built it of 8 mm thick EPP (expanded polypropylene) Foam sheet.  A kit to build an original sized EZ-Fly is available from Fancy Foam Models. The 205 Square inch wing has a 40% Kline-Fogelman strip ( http://theparkpilot.org/kline-fogleman-airfoil-design ) on top of the leading edge.  The 30 gram, CD-ROM style, motor draws 35 Watts turning a 7X3.5 propeller in a central slot.  The battery is a 3S 450 mAh Li-Po type.  The EZ-Fly weighs 9.8 ounces. The EZ-Fly is a very docile trainer, especially after CG was adjusted for stable flight, both fore and aft and laterally.