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.