I have an 1858 which I converted to .45colt. It's the version of the Kirst that incorporates a gated ring, as opposed to their open ring/un-gated version.
I've noticed that Kirst has done at least two versions for thier gated ring conversion.
My conversion uses the style where they milled/notched out a depression in the back end of the gate itself. You must insert a finger tip to pry the gate open. It works ok, but I find it a little awkward to get my finger tip or just a fingernail into the notch sometimes and pull it open with ease. This could be especially true, if you were wearing gauntlets/gloves for shooting.
The #2 version I have seen, Kirst utilizes a small lip that protrudes out from the gate itself. It seems it would be a little easier to open up, than they type I have installed. This type is even a little closer to the original Navy model conversion, which also had a piece protruding out to open the gate/door.
Anyone else think about this or have used both versions to make a comparison? I was thinking about adding a protrusion like version #2 has to my notched out gate to make it faster to open.