Riblets

[David Love]

I suppose I can wait until the November journal, but a couple of questions.
What length and height are these generally speaking?  Do they correspond to
the rib dimension in the section in which they are being installed? And can
they be added effectively when the piano is already strung and up to tension
or should it be done without downbearing pressure on the SB?

David Love
davidlovepianos at comcast.net 
www.davidlovepianos.com