I know I'm late to this game but, I've just printed an m.2 cooler mount, and installed it on my Asus VIII hero without an issue. I'm looking at the Maximus VIII Extreme and I fail to see anything conflicting with the mount, can you take a picture? Regardless, if you have some plastic conflicting, just pull up a dremel and remove it. The cooler mount will be mounted to the standoffs, so you won't notice a difference.