Bush & Lane made very good, but heavy pianos.  A rebuilder around
here told me once there are 16 screws per pneumatic.  Also, to restore
it totally, five gaskets and the zephyr skin pouch must be destroyed.
The gaskets are becoming more difficult, but not impossible to get.

Good luck!  Keep each valve together, they may not fit airtight if
mixed.  By the way, are we getting zephyr skin from the wild zephur
or ranch grown?

Jeff Davis (in Seattle ensconced in Global Cooling)