Airtrippers Bowden Extruder MOD by RepRapPeru

Few changes. Now fit neumatics of E3D online and use some M4 bolts.

UPDATE 01-06-2014
Changes:
* Better fit for e3d Neumatics

UPDATE 06-02-2015
Change:
*ID changed for e3d V6 Neumatics

UPDATE 18-11-18
version 1.8
Changes:
*Add a Ziptie hole for better sujection
*9.8mm hole for e3d neumatics