Y Axis Bearing Holder/Spacer

This is only a derivative of it's parent in spirit. It's a completely new openscad file.
I liked the idea of the parent but I felt that it would be nice to have a little bit more keeping the bearing X Stage perpendicular to the Y Rods. So, this is a spacer for the linear bearings that matches up with 3 of the screws that hold the X stage together.