Hi from Italy. I've published a short review regarding the APM CENTER MOUNT.
In my opinion this mount has many positive sides, especially because in recent years I have used many mounts for binoculars
We have used an APM 100 SD with Berlebach Tripod.
If you want, please use google translate, there's also a menu of translate on binomania on the left column.
Regarding the YouTube video...Enable subtitles on the video, in the original language of the video. To translate, click on the gear icon at the bottom right of the player, and click on the items "Subtitles"- "Automatic translation".