Repair of rear brake caliper also in the FAQ?

Moin Leude,
I have to completely disassemble my brake calipers at the back. The parking brake does not do it, because the actuation shaft in the saddle is jammed and the lever is no longer loosened. I had already partially disassembled the saddle (as posted) a few weeks ago and made the parking brake accessible. Unfortunately, this did not last very long. I had an old saddle lying around and I used to "work out" on that thing. After that, I got angry because I could see that this is not so wild as to disassemble and reassemble the caliper. So I could have saved myself the expensive replacement of the saddle two years ago. The necessary parts are available for little money to buy. However, it is important to use a suitable plier for a safety ring in the caliper (cost approx. 15 euros)) and compressed air should be available. Otherwise, you only need normal tools.
However, I would like to stress (to take into account concerns from another thread) that such a repair should only be done by people who know the matter and know what they are doing.
Should there be any interest in a guide with photos (or is that perhaps in the guide? Because I don't have one) say it - otherwise I also save myself the trouble.