Hello List, and Aurelien, I tried this Roll system once, well, it's new, it works in a way. Another regulating point. My fastest repetition is not fast enough for this system, But, even without it isn't, (sorry me no Volodos). Here is a description of the system; The repetition facility (supplementary system): The rear felt roll pushes against the slap rail: the repetition arm rise and descends accordingly. The roll on the hammer shank supports the hammer and transmits repeated strikes. (Patent No. 87810 035.3-2215-K&M Kummer Special double Echappement Suisse) Well, don't copy. Isn't that a Yamaha Action in that Steingraeber piano? Regards, Rudyard, Holland
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