Pianoshop :: Info :: Figures :: Whippen / Roller Alignment
For the action to have the best response, everything needs to be lined up nice and squarely to give maximum energy transfer. Often one of the things that happens with grands is that the whippens get out of line with the rollers like this:
Above, the roller is sitting off the edge of the whippen. When it is realligned it should look like this:
