No real engineering here.. just plain poligon modeling. is customisable only in cinema4d... im yet to find a suitable copter motor with shafts on both sides. I want to make push-pull impeller tornardo beast. Model is117.5mm outer diameter. (PC Fan) 8mm shaft-hole. (handcrank protoype) scalable but watch your gcode. going to add winglets later.. the bumps will get a 3d shape in the next prototype print upside down.