Small hand cranked flashlight replacement crank parts

This is a replacement crank for a commonly found small hand cranked LED flashlight (see pictures).
I have bought several of these flashlights for less than 2€ piece, but they all end loosing their crank because the crank holding pin is not snug enough.
Sometimes, the crank is lost or even broken, so I print new ones and replace the pin by a piece of 1.75mm PLA or ABS filament that I melt at both ends: better than the original metal pin...

*Edit: Uploaded V3.2*
* This version adds small slo