Snapped lowering valve axis. Invisible to the opening of the package. Everything fits with the thousand bubbles of the inner package. That's when fitting that one wonders from where these unspecified parts in the assembly instructions. Big surprise and no ability to troubleshoot. The device is unusable. I expected JAGO response to resolve the issue. The carton of the package was in relatively good condition but a trace of oil was present. This one seemed to come from another package because no traces inside the carton. It is impossible to mount in front the driver, for a matter of time, and notice this defect ... and refuse the package.