About this 3D model

My goal was to design an X Carriage from scratch with the following attributes: Compact Size to maximize X Travel. Left and Right side 30mm fan mounts. Screw and nut mount for LM8UU linear bearings. 4 post mount to minimize wobble. 5mm platform height and 3mm wall width for rigidity. Large orifice to accommodate different hot ends. Fits the Prusa Mendel Iteration 2. I'm pretty happy with the results and I hope you are too. :) Version 4 fixes laying issue. Please check in Pronterface before printing.