Caveats
Not everyone here is a professional pilot, myself for example, but the analysis of the flaperon is not an area where professional pilot expertise is going to help. It's the realm of engineers, metallurgists, physicists, etc. I'm not one of them either. As I noted, at a minimum those are great photos of the flaperon. The author is working within the limits of what he has access to. It's better than nothing, which is what we have otherwise. Hopefully we will soon get a definitive analysis from people who have full access to the flaperon, but I'm not holding my breath.