Just found this:
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"Chuck Treager, bass luthier and author, has published a new book: Coda to Setup and Repair of the Double bass New Sound Setup Discoveries & Repair Tips.
With its 64 pages, Coda is a much thinner book than Traegers first volume, but also filled to bursting with Double Bass know-how, too. Many chapters reference to the first volume, but feature many new ideas and observations. In some issues, Traeger even correct himself or specify particular details. Being written as a sequel, Coda can also be read without knowing the first volume for inspiratition and fresh ideas for double bassrepairs and sound optimization.
Contents:
The endpin mightier than the sound post
How to make the bass louder and responsive
Simplifying mode matching
making a bass brighter or darker
more about sound posts
and many more
."
See, now THAT's helpful! Knowing this, I'll order a copy.