NOW PUBLIC: Smart Extruder Modification to Print Flex
I finally uploaded the upgrade part for MakerBot Smart Extruder to @Thingiverse. You can even print NinjaFlex with it! www.thingiverse.com/thing:1224851 As information, it is 3d printed with 5th gen @MakerBot Replicator, and I designed it on @SolidWorks.