Alright...
...done some tinkering with this little fella with the objective to sort out three things:
1. Align the bezel insert.
2. Align cyclops
3. Get the crystal a bit higher as it was getting my seconds hand stuck (plus the genuine is not flush and this one is).
First I took the movement off and stored it safely, as
KJ2020 mentioned, on a DG2813 movement it's better to remove the stem in the winding position (for some strange reason I am also more successful doing the same on any 2824 too although it's recommended to use the time settings position).
All ready to take off the crystal. Put one of the crystal press dies and taped gently with a jeweler's hammer and it just took a few taps. Really easy to take it off (makes me wonder about water resistance of this watch...). Here's our good friend, the crystal!
As you can see, it's thick and doesn't have any grooves like other crystals have in order to get the gasket attached in it. Now let's compare with a Clarks I had from a Submariner.
First some measurements of the BP crystal:
And now the Clarks crystal:
In terms of width they are pretty similar, but because the Clarks crystal has the groove in the inner side, it makes it slightly thinner there which makes it impossible to be installed right away. Seems like swapping crystals will be a no no for me this time. I know there are some methods that our expert here
KJ2020 has shown, but I don't have clear epoxy nor an extra gasket, and I am too impatient to wait until I get all that. So moving on.
I decided to take the bezel off. I don't have a hairdryer so I essentially let the watch in some hot water for a couple of minutes and it was easy as a pie to take it off:
Here you can see the ring wire that keeps the bezel in place. An absolute pain in the ass to take off and the reason I decided not to even try to get the retaining ring off to try with my 3mm gasket.
After that, I only had to put the movement back and get the date window aligned, which I would use as a reference to get the insert + cyclops aligned with. And voilà:
Insert aligned (once the glue cooled down it was just a matter of pressing the insert back)
And crystal back in, with cyclops well aligned this time!
Now the funny part... The movement screws are pretty tight, the crystal is also in place, and the seconds hands is moving. So I don't have a clue what was holding it in the first time. Anyhooooow...
Finally, some check with Tickoprint and seems like the movement is actually working very well. Job done!