My adaptation of Doc Brown's EZ-SLEEP from BTTF 2, I made it as accurate to the film as I possibly could and have made it avaliable to you in both STL and OBJ format for either 3D printing or to use however else you like. If you are 3D printing the model it must be scaled to the right size. Also note that the 'wings' do not open but can if you 3D print it.