Good "standards" are moving targets, hopefully going higher and higher. Before attempting to "fix" someone else's mess you must take a lot of measurements, drip, hammer height, bore distance, touch weights, pictures, lots of pictures (before and after), let-off, drop, jack position(s), on and on and on. There are minimum standards of workmanship, functionality within 'normal' parameters. Someone pays for a front end job the car should track straight and true. I think you would have found that on this piano the bore distance was too great, that being the case no amount of regulation will "fix" the problem. Bore distance is critical, very critical, for proper action functioning. I hate fixing other's messes and I hate spending a person's money twice. We all have made mistakes in the past but considering the knowledge based this list represents there is no excuse for doing substandard work. I hope this works out for the best for you and the customer. Newton
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