Compact corner 3d-plexi-printer

These are four corners I designed for my new 3dprinter.
During building my first 3dprinter I gained a lot of knowledge and came up with ideas to improve the initial design. I started to improve these corners. They support the steel rods for the y-carriage and support the bearings for the steel rods that drive the left x-carriage and the right x-carriage. (People who are familiar with the Replicator will know what I mean).
The bearings in the two corners at the back can be adjusted with a M3 s