Any small holes in the top of the soundboard must be filled to prevent the escape of air. The channels are flooded with glue. This is a significant step in the work of restoring the soundboards.

Once this is completed, the next task is to add the action; the pallets (flaps when control the admission of wind to the pipes themselves) and the electro-pneumatic mechanism which operates the pallets.

These pictures only show the Great soundboard - the swell soundboard needs the same treatment, and a new soundboard has to be made for the pedal stops, as the original one is not suitable.