Well, after buying the Atom I immediately crashed it twice. For some reason the plane would tip almost immediately and barrel directly into the ground. I went home after the the nose was smashed and the tail section was cracked in half. After fixing it I found that the motor was anemic so I modded the plane.
I put a larger brushless motor in place of the original and put a 5x5 prop on it. I also enlarged the rudder. I tilted the motor upwards away from the plane and cocked it over a few degrees to the left to reduce the effect of the torquing. the plane seems to fly OK now with lots of power to climb and cut through the wind.
Here are some videos from it's flight.
I use nano-tech 370 or sometime 460 mah batteries, they seem to fit well.