Well the title sums it all up. I'm gonna install a 120mm AIO cooler in the sentry kind of like that guy on the BITWIT youtube channel did with his Node 202 with great results. This idea was mentioned on hardware forum but I never saw anything of it. I'm gonna try a couple of different options as stated in the photo below before going full dremel or hole saw on this case. I don't expect anything crazy amazing but should be good for a light overclock on a 95W TDP CPU. The noctua fan should help with the confines of the space given and static pressure.