Fortunately the cable maker is open to new ideas (It maybe that I've establised a good relationship w/ cable maker throughout the years so not sure mods available for general public so YMMV) and a very kewl audiophile. I have zero issues with ergonomics on my R4 and it naturally flows over the ear. If I had to nitpick, the cable is a bit stiff on the lower end. Not much issue with microphonics but I added a shirt clip just in case. Once you add a point of center, microphonics get reduced to near zero. I used the most flexible 3M heat shrink available, Eidolic 2-pin and 6.3mm Furutech for this build.
With the R4, it helps complete my dream to build the most neutral, reference transportable rig possible up to the transducer. So a neutral, warm and even (bitting my tongue...) colored sig transducer can play nicely with a solid neutral foundation. Hopefully, the future estat CIEMs lean towards a neutral sig.
I'm able now to control my transportable rig with a IR remote control or Apple Watch (No iPhone needed), so it's pretty much hands-free as well as RFI-free now. Although RFI was never an issue, it's pretty much pro-actively eliminated from the equation.
(Should look better IRL with OLED screen)
^^ This still applies but ergos no longer an issue up top. ^^