bass dampers

[Tvak@AOL.COM]

Is it unusual for a grand piano to have two different kind of damper felts on 
the same string in the bass monochord register?  On this piano, each string 
has one "traditional" monochord damper felt, with a big V shaped groove in it 
to fit over the string, and on the other side of the damper, a treble 
tri-chord damper felt; the kind that's just flat.  (This actually continues 
up into the bichord register.  Same deal: one bichord felt matched with a 
treble damper.)

Since I'm replacing the damper felts on this piano, I'm torn as to whether I 
should duplicate this setup or go with matching damper felts.  

Any thoughts?

Tom Sivak