Nice writeup. I for one am glad JM stuck to his guns and ignored the nattering nabobs of negativity at ASR.Gave another shot at a JM Audio review. John modded some Hifiman R7 with Beryllium drivers and other changes. Plastic cup XTC 1.5's more or less. https://www.head-fi.org/showcase/new-beryllium-driver-jm-audio-hifiman-r7.27203/
As a side note, I have been experimenting with optical ethernet and ethernet switch systems to reduce streaming electrical noise and the results have been surprisingly profound. These systems may well be worth a try.