The tongue shaped piece, note hump UPWARDS, at the bottom. Then the special washer (mine being a beautifully made stainless piece run up by Louis the Lathe King). This is indented to allow the tubular spacer, next item up, to sit in an indent. On top is another special washer which is rounded on its edge. This MUST be in top of the tubular spacer (the Jaguar diagram showing it below is WRONG).