This is a replacement knob for the Hawaiian Breeze box fan knob. No supports, low infill. It's nothing too pretty but get's the job done.
OnShape CAD:
https://cad.onshape.com/documents/489402d643ce0a278389274f/w/72e8bb6b47287ae34d632b5c/e/715c306313ff2ad39c789c96?renderMode=0&uiState=662ea2c024003050e8ac2fca