I checked out your video. You are right there is more left in it. It just takes time to have the confidence to take turn 8 at higher speeds. Sometimes it's just a matter of following a really good driver in another car that you know cannot handle as well as your car does and follow him. Also taking to your self helps "If he can do it so can I, If he can do it so can I".
Ha iv'e used that technique on my GSXR and while sometimes it works, iv'e had quiet a few times it didn't! :nonono: