pen adapter --sharpie or HB regular pencil

a friend machined out a 1/2 shaft adaper fits right into the router collet
its spring loaded with about 1/2 play ,the pencil or sharpie is held in with a set screw
The body is brass and the 2 inserts are plastic to house the pencil or sharpie
I called it the king pen adapter

http://youtu.be/XXk5vRARvdw sharpie pen adapter test
http://youtu.be/kyiUnYkWleI using a HB pencil in the pen adapter

Nice one.

Strangely enough (or not) they still make pen adapters for commercial machines.
Here's the module for our Zund G3: http://www.zund.com/en/marker-module

http://www.zund.com/website/uploads/...1x/mam.png?v=1

that looks more high tech than mine