<< the action cannot be removed from the cavity in which it sits..I raised the key bedding adjustment screws all the way, and the bass hammers will not clear the pinblock.>> How far off the rail are the hammershanks? It is not uncommon to have to pull the action out while allowing the hammers to be depressed under the block as they move. It doesn't break the shanks, just pushes things down as it passes under. It helps to hold your breath when you do this, though. (:)}} Ed
This PTG archive page provided courtesy of Moy Piano Service, LLC