You guys must live near smooth roads, I'm up north east scotland where the nearest duel carrageway is 36 miles away. Most of my driving is done on lower "A" roads and "B" roads where under heavy acceleration the bumps and rutts play havoc with the car as the quaif diff is always looking for grip.
I phoned the guy who's car featured in PF magazine to ask if the Vibratechnic torquesteer bush conversion was worth it and he said yes definetly. He also said to get Vibra technic to fit the bushes, so I' guna give them a try to see how I get on.