@Umarak I contacted Lego with the customer service, but I’ll try to ask them on the Bionicle Facebook page too.
Ok so here’s how to make the staff!
I’m just going to leave the lower part off since it’s not important for now.
And here’s how it’s done.
I’m not going to explain the function in great detail, because it’s pretty simple to understand, but the most important thing is that the drill piece has gear teeth inside, and that’s what will activate the gimmick.
And this is the assembly that inverts the rotation. You can use 4 long axles too, it makes the mechanism more secure.
Finally, the top part has a small gear inside that will go between the two gears of the invertor (if this word exists), this will make the top psrt spin in the opposite direction.
This (^^^^) is the gear I’m talking about. The blue pins will connect the top part to the “invertor”.
Ok, now let’s put it together. If at first your mechanism doesn’t work properly or is too stiff, you should take it apart snd try again, you probably didn’t align the gears properly.
As I said before, if at first the function doesn’t work or is too stiff, take it apart and reassemble the staff, you probably didn’t align the gears properly.
Ok, and here’s how I made the shoulder pads. One thing I noticed about @Scarilian 's design that I don’t think is correct is the fact that the pin holes of the Shadow Trap pieces don’t go into the shoulder (in fact in the video they’re not present). I also noticed that the shoulders are asymmetrical, because the armor add-on on the left (our right) is angled outwards, and the one on the right (our left) is straight (I hope it makes sense, feel free to ask for clarifications).
Anyway, here’s my design.
The design is exactly the same on both shoulders, it’s not mirrored.
On a side note…