When removing the older fans, dont be shy to pull each corner of the fan so it slides off the rubber mount. You can reuse these mounts for the new fans once they come in. The only ones that were difficult to fully get on were for the exhaust side inner rubber mounts. I used a needle nose pliers to pull on the mounts as much as I could and that was it. Ill take some better pictures since the ones I took last night were difficult to see.