Yet another rod/axis end cap (fine-tunable) for the Ultimaker

I had some slight longitudinal free play in my rods. Some were making noise when the head brutally changed its direction on a diagonal movement. It probably did not help making better prints also.

So I re-designed my caps once again. This time I embedded one nut in the internal side, and it becomes very easy to prevent any rod from moving on its axis.

Update (thingster derivative): you can also add an external secondary nut in order to lock the screw very tightly (as show on the first pict