For those interested in this headphone, I also stumbled across a Japanese company that has done a lot of testing with this headphone and sells a modded version.
https://gizmo-music.com/?pid=62879082
I ordered a pair with the perfect symmetry mod and am excited to see if there’s any difference between the two. It’s currently on it’s way to my Japanese proxy and I hope they will be a fun Christmas gift to myself. 