Hi Matthew, As you say, checking height changes when varying the force of the pressure on the keys. That is why you have to be careful to put the same amount of force on each key, and that is also important when regulating key dip, because if you do not press all the keys the same way, you will not have an accurate regulation, and key dip is very important for backcheck regulation. You can help that with the installation of firmer front punchings, like the Crescendo white punchings. For me, the best way to regulate backchecks (on a grand), is to make a well regulated sample in each section(15mm from the strings is the Yamaha standard, for example), and then with the action on your knees, align the adjacent hammers with that sample, and so on. You have to bend the backcheck wire with your fingers a little bit, be careful because sometime you don't have to move the wire too much to get a big difference. At the end, if your backcheck regulation is fine, you will have a straight line with your hammers in checking position. I hope this helps, Quentin -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20060323/87581399/attachment.html
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