As was already stated experience helps build up stamina. A few thoughts come to mind however: 1. Your physical condition plays a big part. This includes good dietary and exercise habits 2. Although, I have only tuned a few Soviet pianos, the ones I did do, were very much like Baldwins with "Accutwist Tuning Pins"! :-) Very tightly pin pianos will wear out even the best of us. regards, Joe Garrett, R.P.T. (Oregon)
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