Vertical split ring (2) screws tighten on the tube and the Weaver base at the same time.... not a good design.

On top the bad concept, they are usually made so the screws bind on the side of their clearance holes... more bad design.

Me trying to use v split rings reminds me of Donald Duck changing a flat tire.

https://video.disney.com/watch/donald-s-tire-trouble-4bb39f2cdff29a8833003b15

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps