Another vote for factory service manuals. After getting my first one, for my Honda Nighthawk 750, I'll never be satisfied with Chilton or Haynes ever again. Much more detailed pics, more dteailed instrucions......after all, the factory service manual was written by the people who built the vehicle, instead of by "a complete teardown and rebuild" as the Chilton and Haynes are. I've noticed the erstwhile competitors consistently leave out crucial information not available to them in a teardown/rebuild.
I do have a Bentley, but have ntocied it, too, is lacking vs. the factory manual. Factory manuals are very easy to come by on ebay, whether a book version or on CD.