I like the gearbox sound and use it for several cars now, keeping the original engine sounds.
But, did you notice that the gearbox sound is slightly repetitive?
but wait, if you recorded the sound straight from a s2000 video....where is the vtec/hi-cam switchover sound? wouldn't you hear it in a real s2000 video?
I am not sure but I would say that as you just have 4 samples to describe the engine sound when the throttle is on, you can't catch all the specificities.