Enjoyed watching that thanks Paul.
The 200vi I used to have many years ago broke and it was the VVC mechanism that failed damaging the engine.I asked what was the cause and the mechanic who fixed it said something fell off the VVC mechanism.Looking at the video I think it was perhaps one of the two wheels that are used for the timing of the valve cam.It cost me £1200 to have repaired
Despite that I love the VVC engine it's been in five of my last six cars