<HTML>In a message dated 11/3/02 6:12:36 PM Central Standard Time, avery@ev1.net writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">List, I know I should know this but I don't. Can someone tell me what the 4-sided (older instruments) nut is just above the highest plate strut? The newer ones are 6-sided. I had a buzz the other day that I could stop by touching the plate and I finally stopped it by tightening that nut. It's been a while since I've had a plate out and I can't remember what that attaches to. Why would that cause a buzz? Thanks. Avery </BLOCKQUOTE> That's the bolt that attaches to the horn underneath the piano. I don't exactly what that does, but supposedly give the plate more stability. Wim </HTML>