welcome N/A...
for the Xtension; I believe the wedge is jammed into the reducer...
The wedge and bolt work together to secure retain the cutter in the extension.
screw the set screw into the wedge a tad and lightly hit the head of the screw to knock the wedge loose...
as for the router see the PDF....
after you get everything apart clean everything better than really well..
see the maint PDF...
.
for the Xtension; I believe the wedge is jammed into the reducer...

The wedge and bolt work together to secure retain the cutter in the extension.
screw the set screw into the wedge a tad and lightly hit the head of the screw to knock the wedge loose...
as for the router see the PDF....
after you get everything apart clean everything better than really well..
see the maint PDF...
.