Opel window crank knob stabilizer

A tiny part to stop the knob from falling off. 

My Corsa C-s window crank knob kept falling out, so I modeled a tiny insert to force the snap connector apart after inserting it.

Put the knob back in the lever and push this in from the back. It is a little fiddly, and you may need to play around with XY-contour compensation to get the right fit, but with this small print it takes literally minutes to iterate once.