The action of the stops is mechanical by obligation; but in addition, and according to the needs, we can include an electronic combination system. For the baroque instruments we have developed a system of programmable combination pedals
that is completely mechanical.
The frames are of oak, the rollers are octagonal and also of oak with arms in forged iron; or, completely in iron according to the space available. The same holds for the sabres, which are either in oak or iron. The axles are of brass, broken
into their borings with wax.
The oak, drawknob shafts are square. The knobs are turned according
to ancient models. The name of the stops is hand written on paper
or parchment labels, or engraved on small bone plaques.