Quick test run of my lightest plane to date, the micro Vapor, not quite enough room for more than just circles, but seems like it'll fly well enough. Pretty tempted to make it 3 channel now.

5.25x3" wing
2.1g flying weight
4x8mm motor with watch gear gearbox and balsa prop
remote magnetic actuator for rudder
DasMikro MiRX32M 3 channel RX
10mah lipo
0.2 0.7mm Carbon fiber wings and fuselage stick
Ultrafilm wing covering