PS: To clarify (if needed) what I mean by 'the flange': orient the piece as it would be if it were on the H960 (i.e. with the little interior tabs at the top, and the coloured panel on the front); the 'flange' runs down one side, along the bottom, and up the other side: it's a continuous piece, towards the back of the unit, in a plane parallel to the plane of the coloured front panel. HTH. Noel