I can't find the old thread so I am starting a new one. If you have tried it on a gun and it fits please sound off:
Guns I have personally verified:
Winchester - 30/30, 357
Marlin - 30/30
Reported to fit-
Winchester - 45lc, 44 Mag
Henry Big Boy - 45lc, 44 Mag
I do have a Marlin 357, and had to use a piece of bicycle innertube to get it to fit. I basically cut a square the same footprint as the clamp and then put it underneath. I was able to get it to tighten down with room to spare, whereas without it didn't fit. I actually like the idea of a bit of buffer.