Per Stan's "I'm interested in opinions" request - here's my Can$0.02 worth (discounted).
My accumulation of double-barreled shotguns exhibits the three most common types of forearm attachments.
Because there was so much I did not know and was "self-teaching" - I bought books and READ. (Confession - I was voluntarily seduced by the golden pen of the late and great Michael McIntosh). I read and practiced the proper ways to handle/manipulate each of the three main types … especially the "wheres and whens" to apply pressure - and NOT to apply pressure.
Appears there are physical and monetary pros & cons for all three methods.
However, for my personal tastes - I prefer the Anson forearm release system, as seen on my early AD2000s FAIR O/Us in 16 and 28 GAs.
