I'm currently running 450 lb front springs, but for autocross the nose is still diving too much for my liking. I was thinking of going up to 550 lbs, but before I did, I was wondering if any other Unique owners have had any experience with higher front spring rates? I know some autocrossers go much higher than this (700-800 lbs), but while I don't mind a harsh ride, I still want reasonable drivability. Any advice would be welcome. Thanks.