For the absolute hell of it, I've been thinking of replacing the second fan on my D15 with a Corsair LL fan for some more of that sweet rgb. I can't imagine I'll gain too many degrees on my cooler considering I'm only replacing the outside fan but feel free to let me know. My main concern is mounting it, before I start unscrewing one of my existing fans and test mounting it I want to know if anyone in the community has already attempted this and how well it worked. I am also going to stick with my decision with an LL series fan so it matches my other fans, though I can believe there are other rgb fans better suited for the task. Thanks for your time!