I've recently had an eye-opening experience with the sound post in my Alcoa and wanted to hear if this is at all useful or practical for "normal" wooden double basses... First, there are some points about my Alcoa that should be mentioned: 1) A typical stock Alcoa body is welded together and the top and back are not likely to separate from the ribs. 2) My Alcoa has had a custom welded-patch repair to the top under the bridge area. 3) My Alcoa has had a hinged trap-door installed in the driver side C to facilitate repairs and other customization. This trap door has allowed me to do some experimental and prototype sound post work. 4) I've created and successfully installed a platform-topped sound post to provide more distributed support for the top repairs under both feet of the bridge. 5) This platform-topped sound post is adjustable for length in 6 discrete locations and in one general location. 6) Up to this point I have been using low tension strings on this bass (Innovation SilverSlaps E and A under SBW Deluxe G and D) A couple of weeks ago I increased the tension of this adjustable sound post by increasing its overall length by probably about 1.5mm. The goal was to reduce some subtle rattles that I was hearing while playing pizz at what was then the instrument's top volume. While 1.5mm isn't much, it did make the sound post significantly tighter. This has resulted in the desired elimination of the rattles. It has also noticeably increased volume and note clarity and it has reduced overtones, enough so that I'm no longer concerned about changing to higher tension strings in order to produce greater volume. Since making this change, I've played this bass in groups where I previously couldn't hear my bass acoustically, and now I can hear it very well, so I'm very pleased with this sound post change... I'd really like to hear thoughts about this: For a "normal" wooden double bass, is it (1) safe and (2) helpful to increase sound post tension when trying to achieve higher volume with low tension strings?