This is just a simple pen holder mount I drew in sketchup inspired by Iwan Müller's Kress mount pen adapter.
For use with OB Colt style router mount provided with the C-beam machine bundle. Can use any pen up to a 10mm dia with a M5 lock bolt to secure.
C-beam Machine Pen Mount 2016-02-20
Pen adapter to hold pen inside of c-beam machine colt router mount.