I just purchased a used Leigh D-1258R-24 Dovetail Jig. It will need some cleaning but looks to be in good shape otherwise. I realize there's an upgrade kit from Leigh but I don't know what was supposed to come with the jig originally and suspect some pieces or accessories are missing. All I have is the base and a moveable bar with adjustable fingers on it. What might be missing? Is this thing worth the $100 I paid for it?