I took the optical cage out, and put the lower hard drive cage back in... but that won't have any affect on the H100 mounting anyway. It's really not that big of a deal... I can just wait for the coolers to come in and try it. I'm just gonna have to see for myself the best way to mount it. It's not the end of the world if I have to flip the front panel back, but Jor-El said that it should fit fine.