Re Inner/outer rim separati

[David Porritt]

I don't know how they do it now, but Mason & Hamlin used to string their
pianos with only the inner rim.  They used lag bolts as plate supports,
and without the outer rim they could reach and turn the lag bolts to
adjust the height of the plate, hence the bearing.  I got that from a
slide presentation done 20 years ago by Horace Comstock when he was at
Mason & Hamlin.

Dave Porritt
SMU - Dallas