Glad you got the protective focus assembly off, sorry I wasn't able to be the respondent on that.
The tear down was not with astronomy in mind but was not without a goal either. The main motivation was to see what would come of using some SWIR lenses as well as relay coupling to I2. The latter works exceptionally well but still not sure on the SWIR lenses as I'm waiting for comparable VisNIR lenses. So far a well corrected 400-1000nm VisNIR lens is panning out to be preferable to the SWIR lenses. Also can't stand fixed lens cameras if there an option.
Nothing serious here, just messing around and having fun with it.
Probably no instructional video on the parts removal and not sure on astro photos or videos in either prime or afocal ATM.
If your going to remove the objective, you'll need to first remove the aperture pin connecting the scene selector ring to the lenses aperture ring. The pin is located under a rectangular cap between the fourth and fifth flute of the scene selector ring. That's with the camera lens orientated away from you, just rotate your wrist clockwise to locate the cap, it's held down with a slight bit of adhesive film (double sided).
Don't try and unthread the lens after removing this pin, you'll need to do a bit more. The aluminum cage/sleeve needs to be removed from the back, accessed by removing 4 screws and separating camera head from main body. There are also slots on the crown of the c-mount interface that are filled with adhesive so another reason not to dismount lens prematurely. The adhesive pockets are under the strip of copper shielding tape. It's advisable to remove the adhesive pockets before attempting to dismount the lens, don't get ham fisted on this as the lens will easily spin off once the adhesive is removed.
Be aware theres a bit of copper shielding tape, just peel back and separate only that which is needed to separate the aluminum lens cage and free the lens.
It took about a careful hour from start to completion.
This really needn't be done and don't want to encourage something that could be a catalyst for an action that could damage someone else camera. If your like me and must make an interchangeable camera of the Aurora, then yea, get on with it...