| 1. Before the soundboard is installed into the instrument, it is coated with a special varnish to protect it against climatic changes. The composition of the varnish is essential for the correct flexibility of the soundboard. |
2. The soundboard is glued onto the inner rim, after this has been adjusted to it's curvature. |
3. The rest rail for the iron frame has to be precisely adjusted to the necessary height. Then the holes for the plate screws have to be drilled. |
4. The exact position of the iron frame on the inner rim is vital for the correct functioning of the acoustic system and is therefore constantly monitored and controlled.
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