Compact LM8UU and Igus RJ4JP-01-08 Bearing Holder

Introduction
--------------------------------------------
The purpose of this project was to create compact and light bearing holders that contain no play in them. The project originated when I noticed that the Igus RJ4JP bearings I put inside the aluminum housing had play in them which was apparent when handling the bed or the X carriage. I thought to eliminate this and also create a replacement for the aluminum bearing housing.

I liked six101 design but I had some fit issues. I decided to