OH NO. I'm not sure how I've missed this. The one page/post of this long thread where the gasket is mentioned is probably the one page I did not read.
Thought the valve covers & breathers were all sealed with RTV. I just finished reading all of this once more before starting & we're all set to start down in the garage.
Can you just do the breather covers and then do the VC's next week? (without ruining the seal on the breather covers is what I mean)

Also if you're still here - We haven't figured out how to take the big black engine cover off to access all of this. Thanks