The creator of The Link arcade stick shaft is currently working on a new project for those who want to pad hack their Xbox One controllers for their arcade sticks!
Phreak Mods creator Clayton Knight is producing a piggyback circuit board for Xbox One controllers called the Crossbone. This board allows the ability to easily pad hack the controller with minimal soldering required. Knight also added 20 pin headers to link with the Akishop Customs PS360+ for maximum compatibility.
Players looking for an inexpensive way to mod their arcade sticks for Killer Instinct, this might be your best opportunity!
You can find more information, including installation, here! The Crossbone is expected to release on April 2014!