I know it's a little different, but my hands were crushed in an accident (hit by car while bicycling, force tore the handlebars from my grip. Twenty-six breaks in my right hand/wrist alone, and it's by far the worst one.) I learned about it on reservation, though most there that used it didn't use a ring-they were using the same grip bare. I can shoot it either way but if I use the ring I can do it all day and never feel like I fired a thing. Three finger I can hit pretty well with, but every few shots it tears the skin from my fingers (even with a glove, thank the connective tissue disorder.)
I found it really improved my ease of draw and ability to hold at full draw. Does anyone else shoot like this?