I heard that I won´t get such a big improvement installing the Tecnoweight, comparing to the tungsten weight(Rega) which I noticed was already installed in my RB300. That´s true ?Hernani, it's not true. The metal composition is irrelevant. It's the shape that's important. The dropped lobe of the Tecnoweight lowers the center of gravity of the arm to the plane of the stylus tip. Michell uses the same counter weight on their $1200 Tecnoarm. I assure you, this is a significant upgrade. If you don't hear an improvement after installing, it probably says more about the limitations of your system.
FWIW, the Rega Tungston and the Expessimo Heavyweight were the soup du jour in the early 90s. The Technoweight is a newer, better design.
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