I'm about to rebuild my 20-year-old Silca Pista track pump. Why? When it was working it was a lot smoother than any modern pump I've currently purchased. From what I've read when you replace the leather seal your supposed to slather it with heavy grease; however, grease tends to kill leather so I'm wondering what flavor of grease on supposed to use? does it matter? Is it standard axle grease or should I be using something else?