Excellent! I just ordered some Kaze flex Slim's and will do some experimenting! I insist on the third fan so... Ordered the xflow! I think I will have to mod it slightly, but if it fits, it will clean up tubing runs a lot!SO, the Noctuas I have , are almost everywhere 15,30mm thick.
The Kaze Flex, 14,9 in the center and 14,8 at the corners!
The Kaze Flex structure is also less rigid!