the winding stem has broken off inside the crown
cutting a sink to hold the crown in plastic
CAD drawing for the sink
we now have a nice sink that will hold the crown, so that we can mill out the broken winding stem
drilling a 0.3mm guide hole
the guide hole is perfectly centered
next step is 0.5mm
with the 0.9mm mill, the old thread comes out
and we can fit a winding stem!
the pendant tube got bent, and I re-shape it
