X axis motor holder for linear stepping motor.

I designed the X-axis linear stepping motor holder for my compact size Reprap.
The linear stepping motor has a same specification with a Rep2's Z-axis motor. The lead screw has a quadruple-start thread and 8 mm lead.
This holder assembled with two of LM8UU holder as following link.
http://www.thingiverse.com/thing:86191