Due the fact that zim´s filament guides go beneath the Zimboard-coolingfan, it may happen that the filament inside the pipe pushes upwards, touching the fanblades. To avoid that, just open your ZIM and click the protector to the fan. That´s all. Alternatively, you can use the version without clips and use screws. EDIT: Somehow, Thingiverse deleted most of my textpassages... Re-wrote the description...Simply clip to the fan. That´s all