I designed the Firefly as my wife's first ½A plane.
It's a good flyer with 2 different wings. The original is a sheeted foam
core, flat bottomed wing with lots of dihedral and washout. The other wing
is an Ace mini foam wing with less dihedral. The plane is quite docile
with the flat bottomed wing and very snappy with the ACE wing. A faster
and more aerobatic firefly has been built by a friend with a slightly
thinner airfoil and a rudder.