Always a pleasure Mr Tim San :D.
Honored Posters, lets think on this for a bit.
Cometic's design uses 3 layers in the gasket 'proper'.(up to 5 or 6 in some S/O Nitro apps)
Back on topic, for the purposes of the O/P,s topic
Surface (head & block) finish is paramount & then fastener 'evolved tech'.
So, rewind---
We have 6 'layers' of seal surface. (dry)
on the gasket & then 2 more ---head & block = 8 total :)
& Back on topic, why exactly would Anyone add a lubricant (copper)
to a properly surface finished head & block ???
Honored Posters Please do not take My humble thoughts as a slight
to Ya'lls wisdom . Thx !!!