C02 Regulator Adjustment Knob
thingiverse
If your homebrew C02 regulator, only has screwdriver adjustment, then give this a try. It's a push fit for an 8mm diameter thread. Also here's the Tinkercad file if you want to change it. https://www.tinkercad.com/things/bi3hBL5JJcc
Download Model from thingiverse
With this file you will be able to print C02 Regulator Adjustment Knob with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on C02 Regulator Adjustment Knob.