powdered rosin on backchecks

[Carol R. Beigel]

I do not think use of powdered rosin on backchecks is a good idea, or
roughing up the tails on grand hammers.  Checking of hammers on a grand
piano is best done so that the arc of travel of the hammer collides with the
arc of travel of the backcheck.  Proper regulation will save a lot of wear
and tear on those backchecks.

Carol Beigel, RPT
Greenbelt, Maryland