I don't mind the F2 thing
Yes I have that same Centurion with the side air duct it has 4 screws and can be removed. The distance between screws is 3 inches.
"Can you check this 80mm fan location, cant bigger fan be installed there, because 80mm is very weak.
Its very tight in the front I could not see how to get to it. It's a small fan.
I'll check in the morning about getting to it.
Thanks so much