"Carl Johnson's book is exhaustive on this topic"
Carl J's book is about as bad and the GB's thinking. They can't see the forest through the trees. They are focusing too much on the destruction of Jerusalem as the start of the 7 times. The destruction is not the start of the 7 times because that is not what the prophesy was about. Nathan told David that his offspring would sit on Jehovah's throne to time indefinite. That happened until Jehoiakim became vassal king to Nebuchadnezzer. Jehovah is sovereign, so no king on Jehovah's throne can be a vassal to someone else. The 7 times made that possible by pausing that line of kings for 2520 years when Jesus took the throne. That is all Biblical. Any criticism of that is outside the Bible.