About this 3D model

This setup is currently printing at 20 micron layers ;p This is Mk2 redesigned Ultimaker extruder. It employs a MakerBot Mk6 drive gear over the 2nd gen bolt from Ultimaker. NEW Video http://www.youtube.com/watch?v=AVYZFMKugZU http://www.youtube.com/watch?v=b9pbe6IZs0Y http://youtu.be/U3Rnok5LT00 & http://www.youtube.com/watch?v=kgwDqOj5i4E&feature=youtube_gdata_player Now works with Bowden Clamp www.thingiverse.com/thing:17027