[Heiko]

Thats a lot of oil....
Outside of replacing the AOS i would check the extractor pumps in each
head to make sure they are still working as they should... remember when you put them back in that they are the same for both heads but the right side one should have the 1-3 facing the inside (towards the case) and the front one on the left side (drivers) should have the 4-6 on the inside (facing the case)... If you dont have the orientation right the pumps will not extract the oil back to the sump!
If these pumps are not operating right, the AOS unit will flood under high RPM and oil will pass back into the intake regardless if the AOS is working or not. The only thing that happens to a failing AOS is that the membrane splits and constantly allows a vaccum to the intake; but if the AOS fills too much it will spew oil over into the intake no matter what....
Heiko