Tonight, I got this one, too.
I did buy a thick spacer, and put it below the large cogwheel.
Now, it does not move anymore.
Then, I did notice that the gearbox is oval shaped- and that the region just below it was sitting ON it, not UNDER it.
I fiddled a bit, and this made world of a difference- now the belt is really tensioned as it should be. I did bend the metal "tongue" a bit, and this sits now better and stronger on the large nylon "latch" which I heard is called a "fence".
Whatever, THIS part is solved, cause it does NOT !!!! click when I hit the button from standstill. With a loaded 72AH battery, and I am 82 Kilos.
Now if only the dammed POD would work...see other post.
Carsten