Recreus dual extrusion FFX PLA Free 3D print model

Hi guys,Here another reached goal, dual extrusion with bowden extruder recreus hotend and mixing filaflex and PLA in the same print. We make a thin layer of filaflex (0.2 mm) and then we print PLA over filaflex creating an elastic membrane. Open a new world of possibilities in order to create lightweight flying gadgets for example!!. We use PTFE tube on bowden extruder to avoid high friction, we reach 75mm/s prints with 0.4mm nozzle. http://youtu.be/S5ZomwiEf6c