The music was done by a guy named Glen Gabriel who lives in Sweden and scores movies and video games and well anything. He's really amazing and a friend of a friend. In this case, the music came from an "album" he made of action movie music. He gave us permission to use it and then loved the result. He was even going to compose some custom music to fill in some parts but we didn't have time so we just used what we had.
As far as the gearbox goes. . . Owning an old lotus has forced me to do all kinds of things I used to be afraid of.