Jeffro
Your pretty charts have just now appeared all that we need is a transcription of BM21956. Your charts are problematic because it shows a one year difference beteen the third and fourth years of Jehoiakim synchronized with the 0yr and first year of Nebuchadnezzer. So which is it? Daniel and Jeremiah differ with the beginning of the Neb's reign for you assume that the third year of Daniel is the same as the fourth year according to Jeremiah. Rather Daniel is referring to his third year iof Kingship and not his third regnal year.
You have a nother problem in that you do not know what calendation Jeremiah used so your little pretty chart is not new because scholars have laboured over this problem for decades. Remember when it comes to chronology simplicity always triumphs saves one from getting bogged down in endless technicalities. Your presentation well illustrates the importance of methodology. Your method simply fails for Bible chronology skips over these issues and solves the problem.
I do not know the names of those researchers so I cannot help you. I do not believe it is the most significant point for it is just a small part of the most significant matter in that specific article. Overall the most significant matter is the seventy years.
The other authorities that I refer to are Furuli and Jonsson along with others.I do not consider you to be an authority just a hanger on. I never said that the twenty gap was consistent with other authorities but is only manifest by a comparison as I have explained.
The twenty year gap occurs when you add the total length of the Babylonian dynasty and compare that witht Bible chronology. Whether there are other gaps within the NB period is something which Furuli has investigated and discussed so there is a potential for a much larger gap but for the moment the status quo proves a twenty year gap at the present. Have you read Furuli if not then you should because he has investigated with much thoroughness.
I correct dilemma to dilemna for I do not bother to spell check on these posts. Thanks!
scholar JW