Here you go, trying to stir it up at 2 in the morning!
That question is a slippery slop, it would be hard to enforce just as a power factor rule would be.
I do agree that extensive modifications should not be allowed, such as short stroking, but smoothing an action should be ok, I am sure that some of the old gunfighters had their guns tuned by gunsmiths.
If you gave me all the latest slicked up guns and holsters, I would still finish at the bottom,
I am slower than a turtle in mud.
What was the question?