Cooling ducts for rostock max - 25mm fan

I couldn't find a cooling duct for the rostock max that I believed was light weight enough and provided enough air flow. so i made my own.
instructions for printing and mounting in instructions tab.
I have provided 2 variants of the ducts. The first fits the standard rostock platform that comes with the rostock from seemecnc. The second version has a longer stem. This is because I have recently upgraded to magnetic ball joints and the new platform interferes with the mounting alignment so I have extended the stem and ducting.
uses 3x 25mm fans and whatever mounting screws you have lying around.
Happy Printing :)
-Cambrian Grenier
CGD.inc