Hi there "Old Curious Jack", the Old Chopper here. B) My oh my, the subject of the Scriptures, their origin, and authenticity has been debated for many years. It seems to me a subject of great importance but explained by so many different people with so very many backgrounds. A person's preconceived notions always seem to enter in. I personally liked, in the past, studying the findings of several men who were not Christians, just scholars, they seemed to keep it simple and to the point. I don't have that information now, most of the research I did in Bible College, I gave to other students.
I said all that just to say that God's Word to man was of the greatest importance to our Almighty Father to His children. You know that He wasn't about to let anything or anyone mess up the Holy process of transporting His Word to us. Thru the great power of the Holy Spirit, holy men, OT & NT wrote down exactly what YHWH wanted us to know about creation, thru the sufferings of His Son for our redemption, thru to Revelation, the end of life in this realm. No mistakes, no errors in the original manuscripts.
You are right. We don't have the originals, we have copies. God was also overseeing the copies. Some say that they are perfect copies, others say they are not perfect, that there are errors here and there. As I said before, it depends on who you read and their background. If you read Brother David Cloud who is a King James only man, he will say the T.R. is perfect as well as the KJV of the Bible.
You say, what do I think? There are minor errors but nothing to do with the major tenants of our faith. I still use the KJV, as well as the ESV. Even just these two versions there are differences, but the plan of Salvation is the same, as well as other doctrines....Sorry this is so long, but your question, hit the ball out of the park.