James thats the cd player itself, i tried putting the cage in by itself but i couldn't do it, then i tried putting it in whilst the cage was already on the cd player, basically trying all different ways to get the cage into the slot. I think i may have managed to do it now because where I have kept trying to force it in, it has scraped some of the plastic away from the surround lip and creating just that 1mm or so to let the cage fit in