https://i.imgur.com/uRWEpvP.jpg
https://i.imgur.com/MFkZTR6.jpg
https://i.imgur.com/qTDw1bC.jpg
Ahh! much Better!
https://i.imgur.com/vJibQUt.jpg
The yoke is now centered in the cutout as well...
https://i.imgur.com/27YdBcd.jpg
I have no idea what these cylinders are for....
https://i.imgur.com/b2d1wIG.jpg
The arm is solid with no shoulder hinge points.