It wasn't the focus of the debate in the lawsuit, so I don't think enough time was spent on that. But so called expert witnesses are not always as much experts in their area, as they are experts at being witnesses (IE they get paid to do it).
As far as I'm concerned, the lawsuit you've debated over and over is not very relevant. The point is that we here on this forum, most of us anyway, know how the different armours look like, and we know that SDS is not what they claim it to be. And that makes them liars.