A top-class builder would take pains to get the scaling, pressure and so on exactly suited to the situation, while others might use stock pipes and not put such skill into the voicing. It could make quite a difference to the result.
A clamp is an extension of the soundboard to allow another stop to be added. It can work well if properly done, although putting extra capacity on a soundboard not designed to take it might compromise the result.
A clamp is an extension of the soundboard to allow another stop to be added. It can work well if properly done, although putting extra capacity on a soundboard not designed to take it might compromise the result.