^ Well the CR4000s don't do what the Toronto Flexities do in terms of stuttering and grabbing during hard braking. I look forward to comparing the ride with the regional LRTs using Flexities.
The CR4000s also use fully rotating bogies with a quasi-Jacobs bogie for the articulation. They are much more akin to the ALRVs than to the Flexities in terms of their dynamics and interface with the track.
The damning thing in this for Bombardier is that the "fairly advanced processes" are supposed to be methodically and diligently applied in qc'ing the fabrication. How production reached 60+ cars before this became an issue just astounds me. The techniques may be complex, but the principle of QC'ing welds thoroughly is Quality Management 101 material.
No doubt. It makes one wonder why they simply assumed that the first cars through were fine, and why it appears that they have not been used to assure the processes and training in place were adequate for the whole project.