Great news.. had mine go last year on a 15month old bike. They thought that it was the actuator arm nut, so stipped it all down and fitted the update kit. Was only the spring on the detent arm. I went to the shop to have a look see how they pulled it all apart. They also found a smashed cast washer, can't remember where it came from and some of the gears had rounded so more bits ordred and replaced.