You will need:
1: Air hog helicopter.
2: Good light
3: A sharp exacto knife.
4: Rotary tool.
I first held mine up to a bright light to get an idea of where things were situated inside one of these things. The silhouette revealed where the electronics package was and then I got started.
Take your knife and cut away the front portion of the windows. This will reveal the inner works. That little silver square is the battery. STAY AWAY FROM IT! This is a LiPo type that, if punctured, will catch fire!
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Step 1: A Look Inside.
REmove the windows fully.
Step 2: Skeletonizing.
Start removing weight. The decal that runs along the tail is not needed for flight, loose it.
Then start in with your rotary tool. I cut away a good part of the back end and a little off the top as well. Any extra plastic decorations that may be attached can go too.
Step 3: Did He Really Say Torch?
Yes, I did. After using the rotary tool you will notice rough edges from the Styrofoam. As well as a big static mess all over the place.
To remove these rough edges and harden the foam, take a tourch lighter and brush it by the rough edges.
Step 4: Paint That Pig.
Now you can use model paint or a marker to color the foam. Viola!