paint ball guns

My next door neighbor likes the way I been making the FliteTest RC Aircraft's so he asked me if I can build one for him to fly himself, so I made the FT Simple Cub to start him off with. Some weeks ago i got myself an airbrush starter kit to paint unique designs on the model. and have come up...

I just watched the Star Wars X-Wing Flyer and I noticed it seemed under powered even for the size, I would upgrade it and make it bigger, with foam, carbon fiber, and balsa wood, plus the four jet engines like it has in the movie and try to put some sort of workable paint ball guns on it.