The Z Axis I finished up last time now gets fitted to the front of the X carriage.
The final task is to attach the pulleys and belts.
The red aluminium blocks are belt tensioners. By turning the bolt you can easy tune how tight your belts are.
That completes the physical build, or at least I've run out of kit parts.
The next thing to do will be to hook up some electronics and see if I can get it moving.