<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=utf-8" http-equiv=Content-Type> <META content="MSHTML 5.00.2614.3500" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>Hi Willem,</DIV> <DIV> </DIV> <DIV>Sounds like you live in an area where the climate varies a lot. = Tighten them up in the humid season and there loose in the dry season. I guess = this is the biggest problem with screws, everything they hold becomes loose in = all actions.  </DIV> <DIV>What you are talking about is common with many action including = Renner. Surprisingly enough the same system on the plastic Kawai flange does not = come loose, I guess it boils down to how well the action parts were seasoned = (or dried) the type of timber used and the grain orientation in the = individual part.</DIV> <DIV> </DIV> <DIV>Yamaha is well known for making pianos with different moisture = content for different climates, maybe there is something in the air in your area = which is different to the general.</DIV> <DIV> </DIV> <DIV>Tony Caught ICPTG<BR>Australia<BR><A href="mailto:caute@optusnet.com.au">caute@optusnet.com.au</A></DIV> <DIV> </DIV> <BLOCKQUOTE style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: = 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px"><FONT face=arial,helvetica><FONT size=2><BR>This is what I am talking = about. I don't have as many "walking" center pins <BR>problems with Hamiltons, or = other studios. It seems that every time I tune a <BR>Y in a school or church = I have to take out the action to tighten butt screws <BR>and push center pins = back in. To me that is not right. We shouldn't have to <BR>keep doing that. = That is why I don't like Yamahas. <BR><BR>Willem </FONT></FONT></BLOCKQUOTE></BODY></HTML>