Step-by-step how to regulate an upright piano action. 1. Hammer To String Alignment 2. Key Height & Level - 64-65mm/12mm 3. Dip - 10mm/black key match capstan rise 4. Hammer Distance - 42-46mm 5. Letoff - 2mm 6. Backcheck - 16mm 7. Aftertouch - jack free of hammer butt 8. Dampers - 1/3-1/2 of hammer movement 9. Pedals - 1-3mm lost motion 10. Final Check - smooth operation
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