3D Delta Printer Magnetic Effector and 40mm fan duct to suit Rostock / Kossel style printer with adapter for E3D hot end

This is a custom 3D delta printer magnetic end effector I have desinged to suit my custom aluminium hotend designed for 1.75mm filament. Follow the build progress on my blog http://d3delta3d.blogspot.com.au/ and a video of it in action http://youtu.be/_RzzDTeKAJ0

The efector uses 10mm diameter N42 magnetic balls that are JB glued to the 6 recesses in the top of the end effector. The centre distances of the magnetic balls are 60mm. Regular steel balls could be used and have magnets in th