Multiple online images show, and other threads discuss, that a drive screw (682-9) was used. You already knew this based upon this thread.
Not to discourage you, but the forum has discussed all of this with you before:
Here is your old thread discussing this smoke issue, which builds on this thread.
Here is your thread about an odd smell from a turbine.
Here is another of your threads about smell where "eliminator" is mentioned.
There is also your concurrent thread mentioning some of these issues, which builds upon this previous thread.
