That makes it easier to recognize folks from forum to forum.

I did the Mamba Max mods for my first 4S LiPo brushess project, but I decided to grab the EZRun 80A for the next 4S project. Just seemed to me to be a better value and less work. Even purchasing a used MM, it cost more to put that system together. The nice thing about using the MM in the first project was it's compact size, giving me more placement options such that I could package everything up neatly on the chassis. Small size would still be nice in the next project but there should be enough room for the EZRun, which is huge!

If the fan fails on the EZRun, it looks like it would be pretty easy to swap in a replacement. Appears to be a screw it on and plug it in kind of deal.

Generally where electronics and computers are concerned, it is the electro-mechanical devices that tend to be the first point of failure from a reliability perspective...assuming the system is operating within design limits. Like with computer servers, things like hard drives tend to fail more often than other components.