Yeah, I've heard the gluing process also is very important.Great review! I too have now switched to an internally reinforced blade after several years of playing with outer carbon blades like Viscaria. I like it much better now, although I tried internal carbon before and was not impressed. Perhaps these changes are related to the ball we are playing with now - a different plastic. I bought a clone of Viscaria Stuor for my former partner and he still plays with it. Great blade. As for the factory for the production of blades, unlike rubber production, it does not require special technologies or premises; at least my dad makes the blades that I now play with on his own in his apartment. Here, materials and their quality, as well as an understanding of how to use them correctly, are much more important. This does not depend at all on the size of the factory, but only on access to materials and knowledge of the people who produce these blades.