Hi folks, Regarding Wim's thread. Just finished working over a 14 yr old GH1 with poor tenor checking. Tails digging into the backchecks, borderline-too-strong rep springs, backchecks at about 80 degrees, tails glazed, tails have a S&S-type hump and sharp bottom edge. Tail length about 1". I probably could have fixed the problem just with correcting the angle to 70 degrees, but while at it I worked over the tails quickly removing the hump, glazing and sharp edge. For S&S though I find more often than not that a combination of incorrect backcheck angle ( I like 70 deg), incorrect backcheck height, tails too short ( I like 1"-1 1/16") , and poor tail arcing ( I like a smooth 2.75" - 3") are the main culprits for poor checking. Strong springs are sometimes part of the problem too, but often just draw your attention to the problem. Attached is a S&S document about installing backchecks. Have a great break! Alan -------------- next part -------------- A non-text attachment was scrubbed... Name: Backcheck_Installation.pdf Type: application/octet-stream Size: 164417 bytes Desc: not available Url : https://www.moypiano.com/ptg/caut.php/attachments/20061220/8f40dce7/attachment-0001.obj
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