Brian. Not to be an expert. But I suffered the same and got me confused to death
At the end I was told that when she flys the flaps are "forced level" from wind resistance
And that its ok
I set mine up so that flap just reaches the level when full up and might be a touch down as there is minor slop
The Buzzing doesn't go away but if you just lightly pull on flap up with slight finger touch the buzzing is relieved
Hope this makes sense
I really want to thank all the people here on RCU and especially Dave W for there input on this thread as without it I would not have completed my model
This thread is great and filled with lots of info
And it's so great to have others want to help
