I was using the "Spirit Ultimaker 2 Fan Mount 2" myself. Lately my tempraturesensor lost contact to the heaterblock. So I had to disassamble the printhead. While remounting the Spirit fan mount i broke the holder. Searching for something new I found the "Laber um2-dual-fan-shroud".I took the best ideas of both fan shrouds and designt my own "UM2 FanMount BLIZZARD". You can find more information in the PDF documentation.I'm working on a version of BLIZZARD for the Olsson Block. Stay tuned.