Jim Penton's book Apocalypse Delayed has an intriguing reference at pg. 323 to testimony JF Rutherford gave in 1918 (though he may have erred there with regard to the date).
He wrote that the Proclaimers book contained a number of "outright falsehoods that have become part of Watch Tower mythology. It argues, as have many Watch Tower publications in the past, that the reason JF Rutherford drove four Watch Tower Society directors from office in July 1917 is that they opposed the publication of the book The Finished Mystery, which he had personally authorised. In fact this is an outright lie, as is clearly shown by Rutherford's own statements made in court under oath in 1918."
His footnote at that point cites Rutherford et al. v. The United States, Transcript of Record, 1: 981-2 at 2943-5.
The appeal of Rutherford et al vs the United States was, I think, 1919, not 1918, but there seems to be nothing online that contains a copy of that transcript, even just those two pages Penton cites.
Penton doesn't elaborate on what it was Rutherford did say there in the appeal. My guess is that Rutherford in court confirmed that the opposing directors who he had in 1917 removed from office were not even aware the book was being prepared, so therefore could not have opposed it.
Does anyone have a scan of that part of the transcript?