> So would you say that the danger in adding the fish to reduce the area of > the SB in the treble would be extra stiffness but reduced mass? And what > would constitute a light bridge? > > David Love You haven't apparently built a too stiff treble yet. it *screams* - wild, woolly, and very nasty! And the sustain is very short. Added mass brings the board's resonant frequency down and it gets sweet, clean, and long. That's why I over build with the intention of mass loading the treble. It's a whole lot easier to bring into function by adding mass to a too stiff assembly than it is to stiffen a too flexible one at the top end. A light bridge would be short, narrow, or have holes drilled in it. Those short bridges in the Steinway trebles contribute to the already problematic likelihood of getting a CC assembly stiff enough up there, especially with the panel thinned at the edges! Low mass doesn't show up as a problem in the treble until you get beyond a certain stiffness. That's why I said I thought the short bridge was a stiffness, rather than a mass problem earlier. Ron N
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