I have the convertible already. I figured it was easier to install the grip frame and hammer and trigger than finding nd fitting a mag cylinder.
I have never converted a Bisley grip frame so cannot comment on that but I have converted cylinders on more than one revolver and it is a piece a cake. The trick is in the new cylinder being the same length from ratchet to boss, or slightly longer, as the original cylinder. It is a simple process to stone a few thou's off the front of the boss of the new cylinder.
