very good job. finally some decent buddies to the Kunos F2004 :D there's just one thing that's bothering me, the external sound is like 1000rpm lower than the inside. both should sound the same. and it doesn't sound in concordance with the F2004. if you make the pitch slightly higher, it will sound just as smooth as the real one and be in harmony with the inside sound and the Kunos F2004 :D this will render well better in the replays where right now, it seems that the williams runs a little bit lower in rpm