elctric stove knob

i made a knob for an electric stove i needed , it was intended for a 6mm shaft with 2 flat sides and guide but it may need to be scaled for your needs, it is not a perfect model but i needed it fast and it did the job , i would recommend using supports because is a 1 piece model with over hangs , but most other settings will be mostly depending on your material and preferences . thanks for looking