I recently ran across this channel while looking for information on LXP S22 and S25 sharpeners. The guy takes different sharpeners apart to show all of the details about them and how they work. He also talks about the different known or common problems of the different sharpeners. Being in Russia he is getting sharpeners I haven't heard of before too.
https://www.youtube.com/@my_hobbies_
https://www.youtube.com/@my_hobbies_
