Solidoodle 3 - Square Extruder 40mm Fan Mount
Print PLA! I've created a version of Lawsy's fan duct (http://www.thingiverse.com/thing:30828) that eliminates hotspots for square extruder versions of the Solidoodle 3. This still provides strong airflow across the nozzle for PLA printing without the risk of melting.
Lawsy's duct is great if you've upgraded your nozzle or have the circular version. If your SD3 is like mine, you'll find it often melts. This version solves that issue.