OK, so I have had some questions regarding the parts of the Michell sweep arm that are used for Fett and how they interact with one another on the sweep arm. So lets start with the complete sweep arm.
Now, I have stripped all the unused pieces and in the photos below show how the used pieces connect:
The rocket pack stabilizer is the base of the sweep arm. The upper collar of the stabilizer is loosened and a single wrist dart is inserted and then the collar is retightened. The boot spike is hollow and has a threaded hole in the side of it. It is screwed onto the wrist dart, but once the threads on the wrist dart pass the threaded wall of the toe spike, the spike falls down and simply pivots on the shaft of the wrist dart. The toe spike will turn 360 degrees and has a considerable bit of ability to pivot up and down. That is pretty much it.
In the photo below, you can see the head of the wrist dart inside the hollow toe spike.