When I first started researching the 607 issue, I manually worked out a timeline with the placement of all the Kings of Israel and Judah using the books of Kings and Chronicles and worked out where all of their years lay using both 607 and 587 for the date of Jerusalem's destruction.
I then separately sourced years used by secular historians for regnal years of the Egyptians, Babylonians and Assyrians, as well as points in their history that refer to Jewish kings.
"I have considered the books of Kings and Chronicles in depth and manually mapped the reigns of all of the kings and determined where these kingships lay if the year 587 is assumed for the temple destruction. I then sourced contiguous extracts of the historically accepted reigns of kings for Assyria (884-609), Egypt (993-486), and the Neo-Babylonian (667-539) period. To avoid any bias, I did not have the Israelite king lists visible when I mapped the other reigns to their accepted years. When I checked the completed lists together, I found that the chronologies correctly line up with a number of events: Jehoash paying tribute to Assyrian king Shamshi-Adad V in about 823 (as recorded on an Assyrian inscription); Menahem paying tribute to Pul (renamed Tiglath-pileser III when he ascended the Assyrian throne) in about 760 (2 Kings 15:19-20); exiles being taken by Tiglath-pileser III in the reign of Pekah in about 739 (2 Kings 15:29); Ahaz paying tribute to Tiglath-pileser III in about 731 (2 Kings 15:29); Hoshea conspiring with Pharaoh So (agreed by most historians to be Osorkon IV) and being imprisoned by Shalmaneser in about 726 (2 Kings 17:3,4); Assyrian king Sargon II stating "I besieged and conquered Samaria" (as recorded on an Assyrian inscription) in about 718; Manasseh paying tribute to Assyrian king Esar-Haddon (as recorded on an Assyrian inscription); Esar-Haddon invading Egypt in about 671 (Assyrian history); Manasseh paying tribute to Ashurbanipal (as recorded on an Assyrian inscription); Josiah killed by Pharaoh Necho in about 609 (2 Kings 23:29); Necho defeated by Nebuchadnezzar at Carchemish in 605 (Jeremiah 46:2). (Where I say 'about' I mean to within a year or two.) There were only two reigns that did not fit perfectly. Assyrian king Sennacherib, whose reign appeared to begin 5 years later than the events depicted in Hezekiah's 14th year at 2 Kings 18:13, though it is possible that the events occurred while Sennacherib was prince (as was the case with Tiglath-pileser III at 2 Kings 15:19, 20) The other discrepancy was Pharaoh Shishak's attack on Jerusalem (suggested to be Sheshonq by historians), which was out by some 24 years, but 20 years closer than the Society's reckoning."
When you use 607, it gets very very messy. This cannot be a co-incidence.
I would like to see how 'scholar' defends this.