I see. I’m likely to do something similar. I have a 3D printer so I might be able to get creative as well. I mean just look at this thing.
Anyway, I saw you wrote this comment on your post that you were going to use the longer 0.78mm 2-pins. Have you tried them?
For sound, I like both KSC75 and KPH30i for different reasons, but the KSC75 is physically painful hanging on my ears, even with the new YAXI pads I put on them, which is why I want to mod them as soon as I can.