<HTML>Del, I never thought of this as an option for high end instruments, as you said, this is really a solution for low end pianos. One other thought which I will take a closer look at when I go and tune the small grand in a couple of weeks.  For whatever reason the epoxy behind the bass bridge would not cure after several days.  In the end I scraped it off down to the bare wood.  I have no way of knowing what, if any, penetration occurred but I suspect very little.  You had mentioned in your article the possibility of doing this treatment on only certain areas of the soundboard, since I essentially did that by accident I will let you know if I think it had any noticeable impact.  Andrew Remillard ANRPiano.com</HTML>