I was doing a little more research on the 607 issue. It struck me that what the WT has done is a bit like walking into a room with a perfectly fitting carpet, cutting it in half and adding a strip in the middle. Now the carpet doesn't fit and you are left with the choice of having it running up the walls or full of wrinkles.
Not only are the accepted historical reignal dates of Babylonian Kings altered but so are those of Egypt and Israel. I expect somewhere down the line according to WT cronology we will find a King who was King before he was conceived or someone who reigned from the grave. Wrinkles everywhere.
Just my observations.