Installing screens with focusing wedges - my knowledge

I bought two screens with focusing wedges for Praktisix / Pentacon six cameras to allow me to focus better. I have detailed my knowledge from installation of first screen (from Ukraine) on Praktisix in article Montáž ukrajinské matnice na Praktisix.pdf  from 2022 to 2023. This article was and still is only in Czech, here on Czech page Montáž matnic s zaostř. klíny - poznatky L. Ruffer. Since I bought a screen with wedges from China for my second Pentacon six camera in autumn of 2024, and since mounting of this screen was accompanied by very similar problems to those experienced when mounting screen on Praktisix, I decided to write a new article, where I will extract only the essential parts of original article about mounting of screen from Ukraine and add findings from mounting of second screen so that it can be compared and the new article can be published in English (before November 2024 this page was only in Czech).

New article in English can be downloaded here: 

Installation of Chinese and Ukrainian screens on Praktisix.pdf

For illustration follows picture of its first page: