Comandante C40 MK3 Filling Funnel

Using a Commandante C40 Mk3 hand grinder, it soon turns out, that filling it with beans can mean to bring in some coffee-crumbs in the gab between grinder axle and the upper plastic bearing holder. This is nasty!
To avoid this and to enlarger the filling diameter, I designed a litte "filling funnel" for this fantastic hand grind.
Have fun ...