Bechstein film about production methods

Interesting.
The glue and tickness of the glue layers are important too...   The first time I heard it, but makes sense.

I wonder if was possible to combine each secret of each famous piano manufacturers.

Would global warming have effect over spruce quality, since cold clime it's required for spruce to slow grown and develop closer grain pattern?
If genetic engineering could develop a spruce that grow slower even in hot climes... piano industry would change somehow.