Vw campervan air vent knob

This is my first 3D printed part and first thingiverse contribution so bare with me
i have uploaded the stl file but can upload solid if required for remixes
its quite tight on the spindle which is deliberate as there is no screw, it does fit though.
i used PPLA on an ultimaker 2+ at reading makerspace
i ran it at 10% infill and 0.15mm layer height.
i used the default pla settings for feed speed and heat
it feels a little flimsy but it has held up well so far but i can foresee it getting