Fully Printable Y carriage on 200x200 bed with bearing IGUS STYLE

I decided to make this remix because it is very difficult to align the 4 bearings so that the Y axis slides easily. I have included an extended LM8UU bearing that comes from the IGUS STYLE http://www.thingiverse.com/thing:24990 printed on PLA, and I have adapted the bearing housings to be able to install the 100mm LM8UU.
I add the proyect file for Sketchup. You can edit It.
Heat bed size for this Y carriage must be 200x200 (most common hotbed)

Print the Y carriage and the bearing housings l