As to transfer bars in single actions, I've come to accept the New Model Rugers that have them as original design. Never saw a retrofit Three Screw Ruger that I liked, though. The Ruger conversion is both unsightly and leaves an unacceptably rough action. I change these out as soon as possible.
These are a few of my Single Action .44s:
The middle gun in the bottom row was a .357 Magnum Three Screw that had the factory conversion. I removed the conversion to put it back like it was, then had the gun rebuilt to .44 Special.
I do like the Single Action revolver. Truly Sam Colt was inspired by God.
Bob Wright