A redesigned fan shroud for Ultimaker which drastically improves the ability to print overhangs.
The fan mounts to the shroud using #2 x 0.5" plastit...e screws. The shroud mounts to the ends of the M3 thumb screws using more #2 x 0.5" plastite screws as pinch bolts. Trimming some excess length off of the M3 thumb screws will result in a cleaner path for the air internally, but probably isn't necessary.