The verse I was referring to in the previous post concerning Erasmus' challenge is 1st John 5:7. By the way, I used to be KJV-Only so I understand the mindset that relies on needing to believe God's preservation method is via a translation. James White's book, however, gives another view of preservation which for me is a much better foundation than the "through a translation" method.
I just read "The King James Only Controversy" 2nd Printing - 2009 by James White. No other book has ever excited me so much in describing how God has preserved his Word. Every church member should be given the book and even if you are in the KJV-Only camp you should be secure enough to handle the challenges the book presents. The book gave me concern as to how the KJV does not bring out Christ's deity as clear compared to other versions which is why you often need to use a different version when witnessing to Mormons and Jehovah's Witnesses. It was interesting to read about Erasmus' challenge for anyone to verify it was a legitimate verse but ended up putting it in his 3rd edition once someone presented a manuscript with it in the margin pointing to where the "verse" should go. I also had no idea the book of Revelation had so many errors in the KJV. I didn't know that Revelation 16:5 had a phrase in the KJV only to be found in the mind of a 16th century man, Beza, and no where else in history. It also briefly touches on why the KJV may be softer on homosexuality than other versions. The book presents the method God actually used to preserve his word rather than the "trust us, the KJV is the standard and we just know it is THE translation" method.