Trex-3 driver cooling shroud

thingiverse

Fan shroud for the Trex-3 enhances driver cooling significantly, so it's recommended to print with supports attached only to the bed. This setup will suffice, but you might need to use supports in your profile settings anyway. A nut has been inserted into the print to secure a bolt when removed; unfortunately, once off, it cannot be put back on. The other hole should be filled with hot glue or tape to secure the fan, as there's no bolt hole in the case.