Very interesting test again.

I have some questions:
-Is it possible or even advisable to buy 4 other fans best to mount this type of cooler in a push / pull? Do you think the gain in temperature is interesting?
-Do you think the inverted mounting fans (fresh air which enters the case) can be a good option without this increase over the temperature of other components of the PC?
-Do you think the fans are good or should it consider replacing them for better?
Thank you.