Hi, I have 2 questions regarding my X304: 1. I have a 42 inch deck. What size socket is needed to remove my blades? 2. I have a small grease gun and Lucas Heavy Duty Grease http://www.lucasoil.com/products/di...ow&headTitle= - Lucas X-tra Heavy Duty Grease. Is this grease appropriate to use for the fittings on my John Deere? Do I have to use JD Grease? Many Thanks!