X carriage for OB1.4 printer / Wired1

This is my version of the X carriage for Wired1 printer http://www.thingiverse.com/thing:41967.
The extruder is http://www.thingiverse.com/thing:65939 and was designed by Misan for Prusa I3

The holes on carriage are for 16 mm linear bearings.
Inventor files are included

Added stl and inventor for std LM8UU 15mm

2013/10/11 I am testing a new version with direct drive for 1.75 filament. The print height is increased of about 40 mm.
The stl and inventor files are here.

2014/01/13 Uploaded new working version of direct drive X assembly