An updated fan mount and duct or the new mk3 jigsaw replacement extruder. This design uses the mk3's easy clip on system as well as a smaller 30mm fan.Full installation instructions can be found here:http://www.soliforum.com/post/10438/#p104382.Assemble mount to duct.Clip into mk3 extruder and tweak angle to direct airflow below the nozzle. Carefully unclip duct and mount at this angle.Use acetone or glue to permanently bond the mount and the duct.Insert 30mm fan and mount on Solidoodle mk3 extruder: http://www.thingiverse.com/thing:40711