For Ballys I currently have EBD (my 4th one), Centaur (my 2nd one), Paragon (my 6th one), Flash Gordon (my 3rd one), and Fathom (my 3rd one). I have seen myself dip into Stern SS and Gottlieb system 80 pins recently of the same era so it must be that the late 70's/early 80's pins were the best pins made!