Hi Reiner,
the .blendfile (90 MB) is too large to upload, as I see.
And I applied all transforms (= the movements of the drummers) to the bones (clavicle, upper arm, etc.) needed.
I did not apply the transforms to the drumstick, for it should -as child- move with the thumb. This method worked fine with the right arm.
Regards,
Rrikge
www.VideoVakwerk.nl, I am a video producer, but a starter with animation as in Bfa.