the secrets of the Finger Follower shaft

[ochten]

I have some Lubrication problems with the Exhaust Fingers Lubrication. I noticed a difference between the Inlet and Exhaust Finger Follower Shaft.
The Inletshaft has two holes on the backside but the Exhaust shaft none! Why are the shims different of the Inlet (thicker) and the Exhaust flat?

How is the Lubrication of the Exhaustshaft done? From the back of the Tube through the Key?

[ochten]

The inletshaft has two inlet Oil /intakes for the Fingers, but how about the Exhaust shaft?