Are you saying that because the KJV says 'heaven', and the original Hebrew word is plural, the must be a correction of the Hebrew?
How do you know it's the "original Hebrew"?
"Original Hebrew" is a pretty vague term, don't you think?
And why do people have to clarify it by saying "original"?
Why don't they just say "Hebrew"?
Has the Hebrew language changed?
Or is there a "Koine" and "Classical" Hebrew language?
The autographs are indeed long gone. They were gone before 1611.
Yes, that's my point.
The makers of concordances have access to the same Hebrew and Greek texts as the 1611 translators had.
Then why do they change the wording of the King James?
If the King James writers had access to the same word -- (shamayim) -- as the makers of your concordance had, why did the King James writers write "heaven," and the makers write "heavens"?
All these guys are doing is role-playing what happened from 1604-1611, but doing it their way.
How do you think we Yanks would feel if someone re-wrote the preamble to the Declaration of Independence, which reads:
We hold these truths to be self-evident, that all men are created equal,
that they are endowed by their Creator with certain unalienable Rights,
that among these are Life, Liberty and the pursuit of Happiness.
... and wrote it as:
We hold this truth to be self-evident, that people evolved equally,
that they are endowed by Nature with absolute Rights,
that among these are biological Life, Freedom and the search for Happiness.
Yes, but continuing with your analogy, the KJV wasn't even the first 'piano' in English, let alone Hebrew.
But It is one of the Tuner's eight Pianos, nonetheless.
God tuned the King James piano.
He did not tune anything after that; as the King James piano is the last in His line of special Pianos.