Wow, you're really prepared, always having what you like and what's important to you in stock. I guess you must do a lot of other things under the stairs too 😝.
I recently tried making my own apple cider vinegar, and it was very easy. I still have it stored at the stage in the process where, according to the instructions, I will be able to extract “the mother” of the vinegar, although it is already ready to be consumed.