I won't give away the whole answer, since we must teach newbees to use search and other features.
But here is a head start. You should be able to locate a section with the approprate how-to on Maintenance items.
http://contour.org/mods/mods.cgi?s=howto There is a whole world of Contour.org outside the forums.
Good luck. It should only take about an hour, depending on the ratio of beer consuming time to wrenching time.
TB
