I overfilled mine also. But I thought I had it right until I really stepped on the gas and got a backwash of oil right into the breather. Oil went down the CIS intake system and boy did that thing smoke!
When you get you manuals, You really need to pay attention to them and go back to earlier models if you have a question on how things are done...sometimes the newer manuals dont cover old procedures very well......Porsche manuals were written with the understanding that you "grew up" on the factory floor. My favorite Porsche mechanic says that....so i wont take credit for it.
One thing is for certain....if you have ANY QUESTIONS post them on this website and they will be answered.....