Finally got FLM's attention and they sent me replacement bellcrank posts. I am glad they sent two as they now have the correct diameter but the thread is completely off center. One of them was not too bad so I used one from the kit and one from the replacements I got.
As mentioned in a previous post next challenge was to deal with another FLM design flaw: The Servo mount posts interfere with the Bellcrank. Nothing that some dremell will not solve, but yet another rework.
And still a tight but perfect fit:
Now I can put all together: