I've already ridden 65 mi on greenways this week.
My bells count as pleasurable greetings to pedestrians, and they reply in kind.
The one lady I didn't ring it at was walking straight where I was turning right and I didn't ring my bell, because I didn't want her to stop in my path and turn to look. So I turned behind her and spooked her badly. I apoligized...
I'm sold on Crane mini-Karen bell. I really like the mount, the way it flams the spring hammer (sound of an old-fashioned telephone).
Rivendell sells a
spare stiffer spring hammer for a couple of bucks, and I carry spares because they eventually break with high use. I usually throw a couple in with any order. (I like their nylon pants, also, but they're OOS on the good stuff currently)
The whole L/R F/R thing is off topic.
Just a heads up about Mirrabel - pedestrians can hear it, but other bikes can't, because the high pitch is in the wind noise bandwidth