An inlet assembly for an aircraft engine nacelle includes an inner barrel, an outer barrel radially spaced from the inner barrel, and a rear support for supporting the outer barrel relative to the inner barrel. One embodiment uses this functionality to change the operating version of the packet switching device by originally operating according to a first operating version, operating according to both a first and second operating version, and then ceasing operating according to the first operating version. The canisters may be connected to individual pumps which, in turn, are connected to a dispense outlet. The connecting member includes a first attachment portion and a second attachment portion, with the first attachment portion being detachably attached to an outwardly facing surface of the clamp portion of the first operating unit by an adjustable connection for changing a relative position of the connecting member with respect to the clamp portion.