I know the E21 (is prone to) lifts it's inside rear wheel on hard cornering. I've heard the Quaifes are great, but will spin a wheel when lifted.....they supposedly need a limited amount of differential torque to work properly. Am I better off just rebuilding my LSD with possibly more lock up (say 40%), or should I risk a serious financial wife thrashing and buy one of these cheap Quaifes? By the way, I checked, they are brand new (not used or rebuilt).