I ordered the eccentric attachment, because I had problems every now and then. With the IXO in places to work, where the Screw holes were sitting near an adjacent surface The small part was almost forgotten, but was recently but I provide a valuable service, as I have set our large bookcase wall of individual Ikea elements together. To ensure good stability here I attached to many places cross fittings. Since these should not be visible if possible, I have this set narrowly each among the shelves, so that the visible edge obscured this. To this end, the essay is worth gold. One no longer slips by tilting the screw and can thus significantly more pressure. One thus scratched screw heads, this can again safely solve when necessary and saves time and nerves.
Just a pity that you can not store directly on the IXO the essay.