<div>Okay, so I decided to spend some time this evening looking into my Yamaha U1 I bought last year. The first thing I noticed was all the jacks are plastic. Was that to save money?</div> <div> </div> <div>And then I noticed something about the butt flanges. I was in the process of taking a few hammer shank centers out and testing the center pins using the traditional method of swinging the hammer by holding the flange, when I noticed the following (click link).</div> <div> </div> <div><A href="http://farm3.static.flickr.com/2170/2381002693_3983592996_b.jpg">http://farm3.static.flickr.com/2170/2381002693_3983592996_b.jpg</A></div> <div> </div> <div>What is the purpose of the white string that loops around the flange? I was unable to freely swing the hammers obviously, and I have not seen this before. What is it's purpose?</div> <div> </div> <div>Thank you for your help!<BR>Matthew</div><p> 
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