This model is a remix of K1 rear right bracket side cutout.(https://www.printables.com/model/910436-k1-rear-right-bracket-side-cutout) Diameter of the hole is decreased for ptfe tube If you've enjoyed my work and would like to buy me a coffee to support my creative efforts, you can do so through the link below. Your generosity is greatly appreciated! Buy Me a Coffee: https://www.buymeacoffee.com/ahmetutkuozkan