There are several ways to do it, if you look at the leg sockets and see if the gap is lined up toward the center (the sockets have three tabs if they face away from the center you are good) if so it will snap right in, if not you can use a hose clamp to hold the ash ring to the socket or you can drill a hole in the ash ring tabs and the socket and put a self tapping screw in to hold it.
For the legs, if the legs are loose in the socket, take them out and use a wood broom handle and insert it into the leg and gently wiggle it around to spread the opening up a little and that should tighten up the legs.