Lewis Gilbert's regular editor, Thelma Connell was originally hired to edit the film. However, after an initial cut (which was over three hours long) received a terrible response from test audiences, Peter R. Hunt was asked to recut the film. Hunt's edit turned out to be a much greater success, and he was awarded the director's chair on the next film as a result.
http://en.wikipedia....ve_Twice_(film)
Now, we all know that Wikipedia is user-edited, so that might be untrue, but it's also worth bearing in mind that Thunderball was said to be four hours long at one point...I find this very intriguing, mainly because for both of those movies to be that length originally, there would have to be significant additional sequences and maybe even sub-plots. Surely I'm not the only one who would like to see all this excised footage? Perhaps on another 'Ultimate Edition' DVD...