Lawman
Unless I'm missing something (probably), that kit has been around for a while . I have had one installed on my Uberti 49 .31 . for about 2 1/2 years now. A friend cut the channel, and I have been loading a tiny amount of Trail Boss, over a Mag Tech lead bullet (.32 S&W short Win brass).It was kinda temperamental ,I had to order a new hand from VTI to make it work correctly.(I boogered up the first one). But now it works good with the exception of when the cylinder is full of 5 rounds, and you shoot the first one, the other one that is closest to the channel wants to jump out. This is because the cylinder always advances a little after the shot, and ends up between the next 2 shells.
I did come up with a highly technical fix for this though, I rest my thumb in the slot when shooting it. Kinda an awkward why to shoot, but for as much as I use it, it will work.
I believe that there was an article in one of the most recent Guns of the Old West, or maybe SHOOT, by Dennis Adler on these. He talked a little about the shell jumping problem also.
HANCOCK