<HTML>In a message dated 5/26/01 4:31:43 AM Central Daylight= Time, jajones2@FACSTAFF.WISC.EDU writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px = solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Willem, I’ve heard this comment many times, however I have yet to experi= ence this.    About 1/2 of UW inventory is Yamaha  and I don’t find= the but plate to be a problem.  We do regularly tighten screws and check regulation &nb= sp;-  Yamaha service bond. This happens approximately every 2 years.  No doubt t= his does not happen in many  venues.      I grant there is stress on the butt plate.  Is t= here more stress in the plate than in the plateless flanges?   My hunch is that most t= echs feel the design is the problem.  I have to wonder if service isn’t t= he problem.  How much vertical regulation is offered in ‘normal’ service?=      Hear those flanges clicking?    Would = you like fries with your clicks???     Joel </BLOCKQUOTE> How old are these Yamahas, Joel? The problem I have run across is on Y's= that are more than 10 years old. And the main problem seems to be that the sc= rew hole wears out, and it can't be tighten any more. So now what do you do? Willem </HTML>