Hello, 1. Winter-the piano is tuned along with strings leveled by yanking up creating bends next to agraffs. 2. Summer comes-piano is sharp and tuned down with most movement on the string around the agraff and tuning pins so bends move. Now strings are unlevel. Therefore leveled again by yanking up on lowest string(s) 3. Winter -piano pitch raised -strings leveled more yanking up 4 summer--again more yanking up 5. winter ---more yanking up 6. summer --"' 7. BANG! Mike Jorgensen RPT
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