I did one, but it was so many years ago I can't even remember. I definately need to do one on my car. The locker doesn't lock so well anymore. The rear end girdle is nice if you are launching hard on slicks, but otherwise it's just money spent. I launched my car countless times on the nitrous with slicks on and I never had any rear end problems aside from the locker wearing out. I wouldn't spend the money if you aren't doing serious drag racing all the time.
I went ahead and ordered the t-lok rebuild kit with the carbon clutches. We'll see how that goes. I haven't launched my car countless times on nitrous with slicks, but I'm sure it could benefit from a rebuild. Thanks for all your help.