Hey everyone, after my last post I have been working hard to make all the modifications people have been asking for.

2-Pin 0.78:

Porta Pro/KPH40: https://www.printables.com/model/1713333-2-pin-improved-koss-porta-pro-2-pin-mod

KSC75: https://www.printables.com/model/1713346-2-pin-improved-koss-ksc75-2-pin-mod

MMCX:

Porta Pro/KPH40: https://www.printables.com/model/1690916-mmcx-improved-koss-porta-prokph40-mmcx-mod

KSC75: https://www.printables.com/model/1675349-mmcx-improved-koss-ksc75-mmcx-mod

For all these models, there is a custom flower grill (Kramer mod) too. It improves the bass on the KSC75, from my personal experience. https://www.printables.com/model/1412670-flower-grill-for-koss-headphones-kramer-mod

Each of these mods are free, will always be free, and you are completely free to make any modifications you wish to make.

Edit: also, if anyone feels like selling kits, go ahead. The license has been chosen carefully to allow this. I will not be doing any commerce.

If you don't have a 3d printer, there are services like jlc3dp and pcbway which can print this for you at affordable prices.

Have a fine day, reddit ❤️