OK, dumb question time 
I'm fitting a pair of Stubz to my K3D. Do I just thread lock them on to the flybar or should there be a grub screw in the small hole in the leading edge?
If so what size/type of screw is it?
There's no screws in mine

I'm fitting a pair of Stubz to my K3D. Do I just thread lock them on to the flybar or should there be a grub screw in the small hole in the leading edge?
If so what size/type of screw is it?
There's no screws in mine





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