Celebrated WT scholars appreciate the fact that Neo-Babylonian chronology has a certain appeal in that it deals with the regnal data mentioned in the Bible but using a regnal based methodology is fraught with danger because it cannot accolunt for a twenty year gap between secular and biblical chronology. For this very reason an event-based methodology is preferred because it avouds many of the problems in comparing secular chron ology with the biblical data.
I have previously demonstrated by a complete tabulation of the periods of the Neo-Babylonian kings and the Judean Divided Monarchy that the bible can be completely harmonised with secular chronology, and that was done by using only the bible for all information available therefrom, before adding in the information from secular sources which fell into place perfectly. Of course the Society's 20-year gap cannot be accounted for because it is fictitious.
The other vexing problem that your chronology and methodology cannot account for the seventy years unless it is either ignored or reduced to fifty years, classed as a round number or interpreted as a period of servitude only.
Jeremiah, Daniel and Ezra discuss a period of seventy years that ran from 609 to 539 for which Babylon was dominant, and during parts of which nations such as Judah and Tyre were dominated. Zechariah discusses a 70 year period for which the temple was in disrepair, which ran from 587 to 517. No ignoring, no rounding, no contradictions between the treatment of the 70 years between Judah and Tyre, no contradictions with Jeremiah's initial prophecy, and perfectly harmonious with the bulk of secular chronology.
WT chronology is simple, event based and teats the seventy years as a genuine historical period of exile-servitude-desolation harmonizing all of Scripture.
It is simple to say that the Earth is flat too. I could argue that the bible says the planet has "socket pedestals" and "four corners". But it would be rediculous and would contradict other scriptures. Even if the bible did intend that, it would still be untrue. And such is the Society's 607 interpretation. "Harmonizing all of Scripture"? Just how is the Society's interpretation consistent with Isaiah 45:1, Jeremiah 25:12 and Daniel 5:26-31 which clearly indicate the significance of the event that would end the 70 years.