A further refinement of the X-carriage,
This time no screws or cable ties, it all just pops together and prints fast. Features wiring loom support on the rear and integral wiring holes for fan wiring (neat) of the fore and aft fans. I have mounted my ducted fan on the front to cool the J-head barrel and a rear mounted fan to cool the work. I have gone for simple cable tie belt clamps and I used an inline belt tensioner to take up the slack.
You can often see it printing on my webcam: tinyurl.com/cl2plfv
For best results Slide the LM8UU's in from the ends to prevent splitting, they will hold once in place.