What do you want to see exactly? The last pic without the o-ring is just the same but with a thin bit of clear plastic inside the the black shroud.

The thing to be careful with is that that the black shroud's inner diameter is slightly larger than diameter of the Fenix. So you can't use it as guide to how much of the clear plastic you have to file (the clear plastic in the second picture is the structural part and the black shroud is just for decoration). Just enlarge the clear plastic to under the size of the Fenix and then slowly file out the hole, constantly checking with the Fenix itself how much more and where you have to file the plastic.