Recently put a pickguard on a F mandolin
and wondered if the seemingly larger than needed
foam covered wood rest that sits on the soundboard
dampens the sound. I cant hear a difference but
logic should tell one that anything that interferes
with the vibrations coming from the soundboard
should lessen the sound.
BTW, what should have been a 10 minute job turned
into an hour. Short one brass screw and needed a
longer drill to fasten it to the neck. Did I mention
the foam rest was turned the wrong way & I had to
reposition it ? So much for easy installation.