Was at our local club last night, and someone else who as the same buggy as me said, that this buggy doesn't come with any diff oil in them, and we need to set them up i've got diff oil on order which others recommended last night.What i want to know is how easy is it to take the diffs apart and fill them? As i'm totally new to all this.Is there anywhere on the internet that can show you manual of diffs and how to put together?