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Author Message   Sauli_särkkä Tinkerer Username: Sauli_särkkä Post Number: 47 Registered: 03-2009 Rating: N/A Votes: 0 Posted on Thursday, May 07, 2009 - 11:01 am:    I found, that the helicoid isn't included -- only the front element. On the back of the helicoid-front group, I can see two holes that a spanner would logically fit in. Unscrewing that will evidently be the next step for me.