Thank you, sir! I do my best. Not everyone likes me.....but I'm a lawyer, so I get that.....
Insofar as the statement about Ruger is concerned, let us remember that it is incorrect. Ruger has not "ALWAYS" used frame-mounted firing pins. Ruger's original six-guns, the Single Six and the Blackhawk, functioned just like Colt SAAs with a firing pin on the hammer, a half cock "safety", etc. They even "clicked" like a Colt. Ruger introduced what it called the "New Model Blackhawk" in 1973, using a transfer bar mechanism designed to eliminate accidents occurring when a hammer was hit against a round loaded in the "top" chamber. The Single Six was similarly modified in 1973 and, at the same time, Ruger announced its "retro-fit" program, which still exists. Anyone with a Blackhawk or a SIngle Six made with a hammer mounted firing pin can send the gun to Ruger for a free modification.
Actually, I'd have to check my own gun, but I think original Bearcats are in the retro-fit program, too. I have an original Bearcat and a Single Six, both in the original configuration, and I have no intention of having them modified. When I'm dead the next owner can make that decision.
In case anyone else has forgotten about Ruger's original revolvers, there you have it.