What I like about that style is how the cocking pin is more supported (without the huge chamfer on either side that causes the pin to til). You can also do like I have done and machine off the cocking indicator from the end of the cocking piece and put a pointed set screw in it like the Nate Lambeth kit. There is some machine work but it works great.

Point of interest, I have never done this to the axis style firing pin.