It takes me quite an effort to remove the high pressure ion funnel, and I still can't remove the low pressure ion funnel (it is so tight that I was worrying that I will break it), leave alone the ion optics assembly. There is no instruction to remove low pressure ion funnel and the instruction for removing ion optic assembly is unclear. It appears to be the instruction for ion optic removal (from manual) does not make sense to me at all (does not match what it is in the instrument). Thank you