Dave,  There's quite a group who are all about re-scaling pianos.
I suggest that the great emphasis should be with existing old instruments
[in] that the manufacturers did, in fact, know what they were doing, and
now concentration should be on bridges without cracks around the pins,
making certain the bridges are tight on the pins and snug to the board
and the board is well attached around it's perimeter.

Tom Binnall
Everett, Washington