How are V1 ~ V14 suppose to be held in place? The metal rod thingy can easily slip out of them, and the manual mentions nothing more about them other than how the metal pieces go inside of them.

EDIT: urgh, now I feel stupid. I can't believe I left out the third ball bearing that goes inside the lower hull...

I suppose I should thank you Tom, since you did advise me to look back into the manual