I think that the conditions that the car is under at the time comes into play also. My old mans WRX looked like the EXXON VALDEZ after a couple of laps of Collie, was perfectly fine around AHG track, a little at the Meelup Hillclimb a couple of weeks ago and then perfect around Barbagello ( except losing a bonnet scoop at 200kmh ) last Sunday so the forces of braking and cornering might come into play?? But this is where a few people are left scratching their head.