Don't buy the after run oil, you can get some marvel mystery oil from the hardware store that will last much longer. Also i would stay away from the alumn. servo horn. Alumn. servo horns and alumn. geared servo's never match up because of tolerances and over time it will develop a lot of slop. Also buy the o'donnel 77t plugs instead, after doing that you may be able to save up and get a better servo.