M68 thread on 102ed focuser

[Paz]

I discovered that it may be possible to replace the twist lock on my 102ed with a compression ring like this...

https://www.firstlightoptics.com/adapters/baader-ultrashort-2-inch-eyepiece-clamp.html

I've tried gently unscrewing the existing end of the focuser and nothing feels like it is designed to come off and I don't feel like brute forcing it to find out.

Does anyone have experience of swapping out the end of the focuser, I understand there may be a female m68 thread in there somewhere? (My scope is the altair star wave fpl53 version).

In the photo below I've tried unscrewing the knurled ring and the three-pronged 2" nose piece holder to no avail.