For me, repeated removal of the blue heatsink fan mount led to it becoming a little loose. Coupled with an accidental fan blade breakage I ended up with a rattly fan and mount which moved until it touched the other fan and made even more noise. This was mostly fixed by buying a new fan, but I'd had the idea to create a guard that would keep the two fans apart and at the same time stabilize them both. I'm not sure if this is going to create more pain in the event of changing things, but wanted to throw it out there and see if there was any interest in the model. It's essential just two of these (http://www.thingiverse.com/thing:128718) separated by 6mm with two struts to hold them apart.