Printed in PLA, face down, with support, pulled support out. Needs a 12vdc AC adapter for a 12vdc fan. Used M3 hex socket screws to attach. The fan used in this design is a 60mm "Evercool". It's pulling air OUT through the mounted fan. Room air replaces the exhausted air through the inlet duct. REMEMBER TO HUMIDIFY YOUR GUITAR for a couple weeks after you blow air into it for, say, a couple days. Blowing the smoke out is likely to dehumidify your git. Don't hurt it.