I modified yohann LEFEUVRE design by adding TPU to the Patins (Pads) so that the Jet engine sitting on there would not slip easily when you are rotating the compressor. THe original design was good but did not hold the jet engine well when fidgeting with it. The whole jet engine would slip and roll on you. By printing a TPU pad and gluing on the Patin, it greatly helps preventing any unwanted movements.