6m E layer super DX

The blog of John EI7GL reports on some astounding DX on 50MHz (6m). Although reported as multi-hop Es, I have my doubts. This is like the super DX seen every June between Europe and the Far East. 

My theory is this is E layer propagation but, importantly, not sporadic E. In my view, at least some of these very long paths are the result of some sort of chordal hop E layer propagation. The EU to Far East June 6m openings are at the time when mesospheric clouds are often seen. I wonder if this was the same in the southern hemisphere? Any thoughts?

See https://ei7gl.blogspot.com/2020/12/remarkable-13000-km-opening-on-6-metres.html